2604
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 12
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 24
- Divisor Sum
- 7168
- Proper Divisor Sum (Aliquot Sum)
- 4564
- 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
- 720
- Möbius Function
- 0
- Radical
- 1302
- Omega Function (Ω)
- 5
- Little Omega Function (ω)
- 4
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
- 102
- 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 stacks, or planar partitions of n; also weakly unimodal compositions of n.at n=16A001523
- Weight distribution of [ 64,22,16 ] 2nd-order Reed-Muller code of length 64.at n=12A001726
- Weight distribution of [ 64,22,16 ] 2nd-order Reed-Muller code of length 64.at n=4A001726
- Numbers k such that k^4 can be written as a sum of four positive 4th powers.at n=12A003294
- a(n) is the number of forests with n (unlabeled) nodes in which each component tree is planted, that is, is a rooted tree in which the root has degree 1.at n=11A005198
- Record values in A005210.at n=53A005211
- Truncated square numbers: 7*n^2 + 4*n + 1.at n=19A005892
- Coordination sequence T2 for Zeolite Code AFS.at n=39A008024
- Coordination sequence T2 for Zeolite Code BPH.at n=39A008056
- Coordination sequence T2 for Zeolite Code CAS.at n=31A008064
- Linear 2nd order recurrence: a(n) = 4*a(n-1) + 5*a(n-2).at n=6A015531
- a(n) = n*(9*n + 1)/2.at n=24A022267
- a(n) = b(n) + d(n), where b(n) = (n-th Fibonacci number > 2) and d(n) = (n-th number that is 1 or is not a Fibonacci number).at n=14A023488
- a(n) = b(n) + d(n), where b(n) = (n-th Fibonacci number > 2) and d(n) = (n-th number that is 1 or is not a Lucas number).at n=14A023496
- a(n) = b(n) + d(n), where b(n) = (n-th Fibonacci number > 1) and d(n) = (n-th number that is 1, 2, or 3, or is not a Lucas number).at n=15A023500
- a(n) = T(n, n+3), T given by A027052.at n=9A027054
- a(n) = A027052(n, 2n-9).at n=7A027065
- 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 34.at n=16A031532
- Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 34.at n=2A031712
- Numbers with the property that all pairs of consecutive base-5 digits differ by more than 2.at n=39A032982