1516
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 2660
- Proper Divisor Sum (Aliquot Sum)
- 1144
- 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
- 756
- Möbius Function
- 0
- Radical
- 758
- Omega Function (Ω)
- 3
- Little Omega Function (ω)
- 2
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
- 60
- 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 concatenated with n + 1.at n=14A001704
- a(2n) = a(2n-1) + 2a(2n-2), a(2n+1) = a(2n) + a(2n-1), with a(1) = 2 and a(2) = 3.at n=11A001882
- Sum of digits of n-th term in Look and Say sequence A005150.at n=23A004977
- Number of alternating sign 2n+1 X 2n+1 matrices invariant under all symmetries of the square.at n=8A005164
- Series for first parallel moment of square lattice.at n=9A006732
- Number of extreme points of the set of n X n symmetric doubly-stochastic matrices.at n=7A006847
- Coordination sequence T2 for Zeolite Code EUO.at n=24A008097
- Coordination sequence T1 for Zeolite Code LIO.at n=27A008129
- Coordination sequence T2 for Zeolite Code MOR.at n=25A008183
- Coordination sequence T4 for Zeolite Code iRON.at n=28A009884
- Coordination sequence T4 for Zeolite Code RTH.at n=27A009896
- Coefficients in expansion of Euler's constant gamma as Sum_{n>=1} a(n)/(n*n!*(n+1)!), as found by greedy algorithm.at n=46A009929
- Values of k at which the period of the continued fraction for sqrt(k) sets a new record.at n=26A013645
- Expansion of 1/(1-x^5-x^6-x^7-x^8-x^9-x^10-x^11-x^12-x^13-x^14-x^15).at n=34A017846
- Expansion of 1/(1 - x^12 - x^13 - ...).at n=64A017906
- Powers of cube root of 3 rounded down.at n=20A017982
- Powers of cube root of 3 rounded to nearest integer.at n=20A017983
- Powers of cube root of 9 rounded down.at n=10A018000
- Powers of cube root of 9 rounded to nearest integer.at n=10A018001
- Number of lines through exactly 7 points of an n X n grid of points.at n=38A018814