1508
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
- 1
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 2940
- Proper Divisor Sum (Aliquot Sum)
- 1432
- 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
- 672
- Möbius Function
- 0
- Radical
- 754
- 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
- 65
- 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
- Expansion of Product_{k>=1} (1 - x^k)^16.at n=20A000739
- Absolute value of Glaisher's beta'(2n+1).at n=45A002291
- Heptagonal (or 7-gonal) pyramidal numbers: a(n) = n*(n+1)*(5*n-2)/6.at n=12A002413
- a(n)=least number m such that m-a(n-1)<>a(j)-a(k) for all j,k less than m; a(1)=1, a(2)=3.at n=37A004979
- Related to representations as sums of Fibonacci numbers.at n=34A006133
- Taylor series related to one in Ramanujan's Lost Notebook.at n=18A006305
- Expansion of (1+x^7)/((1-x)*(1-x^2)*(1-x^3)*(1-x^4)).at n=46A008768
- If a, b in sequence, so is ab+4.at n=30A009303
- Coordination sequence T3 for Zeolite Code iRON.at n=27A009883
- Coordination sequence for sigma-CrFe, Position Xf.at n=10A009958
- a(n) is nonsquarefree and is sum of first k nonsquarefrees for some k.at n=14A013935
- Number of segments (and sides) created by diagonals of an n-gon in general position.at n=10A014628
- Coordination sequence T5 for Zeolite Code TER.at n=26A016437
- Expansion of 1/(1-x^10-x^11-x^12-x^13-x^14).at n=70A017890
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite MTT = ZSM-23 Nan[AlnSi24-nO48] starting with a T3 atom.at n=10A019188
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite MTT = ZSM-23 Nan[AlnSi24-nO48] starting with a T4 atom.at n=10A019189
- Fibonacci sequence beginning 0, 4.at n=14A022087
- Numbers k such that Fibonacci(k) == -3 (mod k).at n=23A023164
- Position of n^2 + 5 in A000408.at n=42A024801
- Square of the lower triangular normalized partition matrix.at n=17A027516