2502
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 9
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 5460
- Proper Divisor Sum (Aliquot Sum)
- 2958
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 828
- Möbius Function
- 0
- Radical
- 834
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 3
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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 27
- 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
- yes
- Odd
- no
Appears in sequences
- Number of points on surface of octahedron; also coordination sequence for cubic lattice: a(0) = 1; for n > 0, a(n) = 4n^2 + 2.at n=25A005899
- Coordination sequence T3 for Zeolite Code ATS.at n=36A008040
- Coordination sequence T5 for Zeolite Code EUO.at n=31A008100
- Coordination sequence T2 for Zeolite Code GOO.at n=34A008112
- Coordination sequence T2 for Zeolite Code -CLO.at n=44A009851
- Coordination sequence T2 for Zeolite Code ZON.at n=35A009920
- a(0) = 1, a(n) = 25*n^2 + 2 for n > 0.at n=10A010015
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite MEI = ZSM-18 Nan[AlnSi34-nO68].28H2O (n=2.1-5.7) starting with a T2 atom.at n=11A019144
- Expansion of Molien series for 8-dimensional real Clifford group 2^{1+6}.Alt_8.2 of genus 3 and order 5160960.at n=37A024186
- a(n) = floor(floor(S3)/floor(S1)), where S3 and S1 are, respectively, the 3rd and first elementary symmetric functions of {sqrt(k), k = 1,2,...,n}.at n=30A025200
- Number of cubefree words of length n on two letters.at n=18A028445
- Numbers k such that k^2 has only even digits.at n=41A030097
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 50.at n=0A031548
- Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 50.at n=1A031728
- Numbers n such that BCR(n) = n, where BCR = binary-complement-and-reverse = take one's complement then reverse bit order.at n=38A035928
- Friedman numbers: can be written in a nontrivial way using their digits and the operations + - * / ^ and concatenation of digits (but not of results).at n=32A036057
- Positive numbers having the same set of digits in base 4 and base 7.at n=41A037425
- Numbers k such that k-th and (k+1)-st term of A038593 differ by 2.at n=45A038633
- Denominators of continued fraction convergents to sqrt(954).at n=7A042847
- Numbers k such that the string 3,8 occurs in the base 9 representation of k but not of k-1.at n=34A044286