1134
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 9
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 20
- Divisor Sum
- 2904
- Proper Divisor Sum (Aliquot Sum)
- 1770
- 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
- 324
- Möbius Function
- 0
- Radical
- 42
- Omega Function (Ω)
- 6
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 62
- 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 g.f. (1 + x + 2*x^2)/((1 - x)^2*(1 - x^3)).at n=40A000969
- Period of 1/n! in base 10.at n=15A000976
- Period of 1/n! in base 10.at n=14A000976
- sigma_3(n): sum of cubes of divisors of n.at n=9A001158
- Smallest even number that is an unordered sum of two odd primes in exactly n ways.at n=49A001172
- Squares written in base 5.at n=13A001740
- MacMahon's generalized sum of divisors function.at n=11A002128
- Squares written in base 9.at n=28A002442
- Cluster series for honeycomb.at n=12A003204
- Numbers that are the sum of 11 positive 5th powers.at n=51A003356
- Number of stable trees with n nodes.at n=12A003426
- a(n) = 3^n*Catalan(n).at n=4A005159
- Let T(n,d) = number of distinct d-dimensional polyominoes (or polycubes) with n cells (A049429, A049430); sequence gives Sum_{d} T(n,d).at n=6A005519
- Number of achiral planted trees with n nodes.at n=15A005627
- Number of entries in first n rows of Pascal's triangle not divisible by 3.at n=77A006048
- Maximal length of rook tour on an n X n board.at n=11A006071
- Denominators of generalized Bernoulli numbers.at n=5A006568
- a(n) = Sum_{k=1..n-1} k XOR n-k.at n=41A006582
- Coordination sequence T3 for Zeolite Code LAU.at n=24A008126
- Coordination sequence T2 for Zeolite Code LEV.at n=25A008128