12175
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 15128
- Proper Divisor Sum (Aliquot Sum)
- 2953
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 9720
- Möbius Function
- 0
- Radical
- 2435
- Omega Function (Ω)
- 3
- Little Omega Function (ω)
- 2
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 156
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Sum of cubes of primes dividing n.at n=45A005064
- Sum of cubes of primes = 2 mod 3 dividing n.at n=45A005076
- Numbers n such that n | 11^n + 10^n + 9^n + 8^n + 7^n.at n=43A057251
- McKay-Thompson series of class 25A for Monster.at n=28A058594
- Radii of the circles around (0,0) that contain record numbers of lattice points, rounded up to the next integer.at n=19A071384
- Numbers of the form p^3 + q^3, p, q primes.at n=35A086119
- Arrange n^2 octagons that each have area 7 so that they leave (n-1)^2 square gaps each with area 2; a(n) is the total area of these polygons.at n=36A086640
- Numbers k such that 7*10^k + 2*R_k - 1 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=12A103052
- a(n) = A104908(n) - 100*A104803(n).at n=22A104910
- Sums of two distinct prime cubes.at n=28A120398
- 3-almost primes that are the sum of 2 positive cubes. Sums of 2 positive cubes, with the sums having exactly 3 prime divisors counted with multiplicity.at n=38A122732
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 1, -1), (-1, 1, 1), (0, 1, 1), (1, 0, 0)}.at n=8A149996
- Numbers n which divide the periodic part (with zeros at end) of the decimal expansion of 1/n.at n=11A179267
- a(0) = 0, and for n > 0, a(n) = A002956(n) - A000041(n).at n=21A181887
- [(1+e^n)/(1+e*n)], where [ ]=floor.at n=12A191693
- Sum of cubes of prime factors of n (counted with multiplicity).at n=45A224787
- Number of partitions of n such that (greatest part) > (multiplicity of least part).at n=35A240184
- Row sums of triangle A027420.at n=44A241944
- Number of inequivalent (mod D_4) ways to place 2 nonattacking knights on an n X n board.at n=19A243717
- Values of a^3 + b^3 such that the equation a^3 + b^3 = x^2 + y^2 + z^2 is not soluble where a, b > 0 and x, y, z >= 0.at n=27A272174