1012
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 4
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 2016
- Proper Divisor Sum (Aliquot Sum)
- 1004
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 440
- Möbius Function
- 0
- Radical
- 506
- 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
- 111
- 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
- a(n) = 2^n - n - 2.at n=8A000247
- Generalized Stirling numbers of second kind.at n=4A000558
- a(n) = solution to the postage stamp problem with 3 denominations and n stamps.at n=22A001208
- a(n) = n*phi(n).at n=45A002618
- Numbers k such that (k^2 + k + 1)/21 is prime.at n=45A002644
- Discriminants of the known imaginary quadratic fields with 1 class per genus (a finite sequence).at n=52A003644
- Expansion of (Sum_{n=-inf..inf} x^(n^2))^(-22).at n=2A004423
- Powers of 2 written in base 3.at n=5A004642
- Expansion of (1+x^2)/((1-x)^2*(1-x^2)^2).at n=21A005993
- a(n) = n*(n+1)*(2*n+1)/3.at n=11A006331
- If n mod 2 = 0 then n*(n^2-4)/12 else n*(n^2-1)/12.at n=23A006584
- a(n) = 4*binomial(4*n+11, n)/(n+4).at n=3A006635
- Numbers in base 3.at n=32A007089
- a(n) = floor(n^2/2).at n=45A007590
- n written in base where place values are positive squares.at n=21A007961
- Coordination sequence T3 for Zeolite Code MEP.at n=19A008159
- Coordination sequence T1 for Zeolite Code ATO.at n=21A008265
- Triangle T(n,k) of associated Stirling numbers of second kind, n >= 2, 1 <= k <= floor(n/2).at n=26A008299
- Multiples of 22.at n=46A008604
- Multiples of 23.at n=44A008605