128215 (number)
128,215 (one hundred twentyeight thousand two hundred fifteen) is an odd sixdigits composite number following 128214 and preceding 128216. In scientific notation, it is written as 1.28215 × 10^{5}. The sum of its digits is 19. It has a total of 2 prime factors and 4 positive divisors. There are 102,568 positive integers (up to 128215) that are relatively prime to 128215.
Basic properties
 Is Prime? No
 Number parity Odd
 Number length 6
 Sum of Digits 19
 Digital Root 1
Name
Short name  128 thousand 215 

Full name  one hundred twentyeight thousand two hundred fifteen 
Notation
Scientific notation  1.28215 × 10^{5} 

Engineering notation  128.215 × 10^{3} 
Prime Factorization of 128215
Prime Factorization 5 × 25643
Composite numberω(n)  Distinct Factors  2  Total number of distinct prime factors 

Ω(n)  Total Factors  2  Total number of prime factors 
rad(n)  Radical  128215  Product of the distinct prime numbers 
λ(n)  Liouville Lambda  1  Returns the parity of Ω(n), such that λ(n) = (1)^{Ω(n)} 
μ(n)  Mobius Mu  1  Returns:

Λ(n)  Mangoldt function  0  Returns log(p) if n is a power p^{k} of any prime p (for any k >= 1), else returns 0 
The prime factorization of 128,215 is 5 × 25643. Since it has a total of 2 prime factors, 128,215 is a composite number.
Divisors of 128215
4 divisors
τ(n)  Total Divisors  4  Total number of the positive divisors of n 

σ(n)  Sum of Divisors  153864  Sum of all the positive divisors of n 
s(n)  Aliquot Sum  25649  Sum of the proper positive divisors of n 
A(n)  Arithmetic Mean  38466  Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n)) 
G(n)  Geometric Mean  358.07122196569  Returns the nth root of the product of n divisors 
H(n)  Harmonic Mean  3.3332033484116  Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors 
The number 128,215 can be divided by 4 positive divisors (out of which 0 are even, and 4 are odd). The sum of these divisors (counting 128,215) is 153,864, the average is 38,466.
Other Arithmetic Functions (n = 128215)
φ(n)  Euler Totient  102568  Total number of positive integers not greater than n that are coprime to n 

λ(n)  Carmichael Lambda  51284  Smallest positive number such that a^{λ(n)} ≡ 1 (mod n) for all a coprime to n 
π(n)  Prime Pi  ≈ 11977  Total number of primes less than or equal to n 
r_{2}(n)  Sum of 2 squares  0  The number of ways n can be represented as the sum of 2 squares 
There are 102,568 positive integers (less than 128,215) that are coprime with 128,215. And there are approximately 11,977 prime numbers less than or equal to 128,215.
Divisibility of 128215
m  2  3  4  5  6  7  8  9 

n mod m  1  1  3  0  1  3  7  1 
The number 128,215 is divisible by 5.
Classification of 128215
By Arithmetic functions
 Arithmetic
 Semiprime
 Deficient
Expressible via specific sums
 Polite
By Powers
 Square Free
Other numbers
 LucasCarmichael
Base conversion (128215)
Base  System  Value 

2  Binary  11111010011010111 
3  Ternary  20111212201 
4  Quaternary  133103113 
5  Quinary  13100330 
6  Senary  2425331 
8  Octal  372327 
10  Decimal  128215 
12  Duodecimal  62247 
16  Hexadecimal  1f4d7 
20  Vigesimal  g0af 
36  Base36  2qxj 
Basic calculations (n = 128215)
Multiplication
n×yn×2  256430 

n×3  384645 
n×4  512860 
n×5  641075 
Division
n÷yn÷2  64107.500 

n÷3  42738.333 
n÷4  32053.750 
n÷5  25643.000 
Exponentiation
n^{y}n^{2}  16439086225 

n^{3}  2107737440338375 
n^{4}  270243555912984750625 
n^{5}  34649277521383339801384375 
Nth Root
^{y}√n^{2}√n  358.07122196569 

^{3}√n  50.425043193797 
^{4}√n  18.922769933751 
^{5}√n  10.509638245426 
128215 as geometric shapes
Circle
Radius = nDiameter  256430 

Circumference  805598.60416003 
Area  51644912516.189 
Sphere
Radius = nVolume  8.8288699443509E+15 

Surface area  206579650064.76 
Circumference  805598.60416003 
Square
Length = nPerimeter  512860 

Area  16439086225 
Diagonal  181323.39189967 
Cube
Length = nSurface area  98634517350 

Volume  2107737440338375 
Space diagonal  222074.89429244 
Equilateral Triangle
Length = nPerimeter  384645 

Area  7118333142.9264 
Altitude  111037.44714622 
Triangular Pyramid
Length = nSurface area  28473332571.706 

Volume  2.4839923950401E+14 
Height  104687.10912365 
Cryptographic Hash Functions
md5  5fcf301eea62ce1371469d43cc6dfa62 

sha1  d1984d10583020b03fd689fabf4b3911c9ab2bde 
sha256  0c1293a8ab82752fe1193c5fecbb88937afab2728db45ab5aff94cf9dd78da9a 
sha512  dfc4832b9aa6c1d4b3e4d4fe909cacc4e68ee10fd84bda523e248871d4bb0a355089c38794b3379aca17ba86fc18374b4b1df9b3c2296ec3f17f25dbf5f96856 
ripemd160  ac1ae5d067a4f4b855126f082191d901436f4b61 