1292
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 2520
- Proper Divisor Sum (Aliquot Sum)
- 1228
- 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
- 576
- Möbius Function
- 0
- Radical
- 646
- 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
- no
- Narcissistic Number
- no
- Collatz Steps
- 101
- 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) = (n+1)*(n+3)*(n+8)/6.at n=17A000297
- Convolution of A000203 with itself.at n=13A000385
- Denominators of continued fraction convergents to sqrt(5).at n=6A001076
- Number of 5-line partitions of n.at n=12A001452
- Coefficients for step-by-step integration.at n=3A002402
- Expansion of 1 / ((1-x)^2*(1-x^2)*(1-x^3)*(1-x^4)).at n=24A002621
- 'Core' alternating sign n X n matrices, i.e., those that are not 'blown up' from a smaller matrix by inserting row i, column j with a_ij = 1 and all other entries in that row and column equal to 0.at n=3A003827
- a(n) = floor(Fibonacci(n)/2).at n=18A004695
- a(n) = floor(n*phi^9), where phi is the golden ratio, A001622.at n=17A004924
- a(n) = round(n*phi^9), where phi is the golden ratio, A001622.at n=17A004944
- a(n) = Sum_{k=0..floor(n/4)} binomial(n-2k,2k).at n=17A005252
- Coefficients of modular function G_3(tau).at n=29A005761
- Numbers k such that phi(k) = phi(sigma(k)).at n=47A006872
- Dimension of n-th compound of a certain space.at n=10A007182
- Numbers k such that phi(x) = k has exactly 3 solutions.at n=47A007367
- Coordination sequence T2 for Zeolite Code FER.at n=22A008107
- Coordination sequence T2 for Zeolite Code JBW.at n=24A008122
- Coordination sequence T3 for Zeolite Code LOV.at n=24A008136
- Coordination sequence T2 for Moganite, also for BGB1.at n=23A008259
- Coordination sequence T3 for Zeolite Code VSV.at n=23A009916