5236
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 24
- Divisor Sum
- 12096
- Proper Divisor Sum (Aliquot Sum)
- 6860
- 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
- 1920
- Möbius Function
- 0
- Radical
- 2618
- 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
- no
- Narcissistic Number
- no
- Collatz Steps
- 147
- 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 generalized partition function.at n=14A002601
- Number of closed meanders with 2 components and 2n bridges.at n=4A006657
- Coordination sequence T7 for Zeolite Code MTT.at n=45A008195
- Triangle read by rows: T(n,k) = number of closed meander systems of order n with k<=n components.at n=16A008828
- Aliquot sequence starting at 180.at n=21A008891
- Expansion of Product_{k>=1} (1 - x^k)^17.at n=11A010823
- Least nonsquare having square residues for all moduli 2 through n.at n=18A018883
- Least nonsquare having square residues for all moduli 2 through n.at n=17A018883
- Least nonsquare having square residues for all moduli 2 through n.at n=19A018883
- Least nonsquare having square residues for all moduli 2 through n.at n=20A018883
- Number of terms in 5th derivative of a function composed with itself n times.at n=15A022815
- Numbers k such that 33*2^k+1 is prime.at n=23A032366
- Duplicate of A008828.at n=16A046690
- Number of positive integers <= 2^n of form 5 x^2 + 8 y^2.at n=16A054178
- Coordination sequence T2 for Zeolite Code MTF.at n=43A057305
- Dimension of the space of weight n cuspidal newforms for Gamma_1( 75 ).at n=38A063348
- Dimension of the space of weight n cuspidal newforms for Gamma_1( 89 ).at n=16A063362
- Numbers with ever-increasing minimal-square-deniers.at n=10A066730
- Numbers n such that A068340(n) = +-1.at n=7A076542
- a(1) = 0, a(2) = 1, a(3) = 1, a(4) = 7; thereafter, a(n) = a(n-1) + (n-1)*a(n-2).at n=9A086828