11946
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 21
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 26208
- Proper Divisor Sum (Aliquot Sum)
- 14262
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 3600
- Möbius Function
- 1
- Radical
- 11946
- Omega Function (Ω)
- 4
- 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
- 24
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- yes
- 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
- Number of n-step self-avoiding walks on hexagonal [ =triangular ] lattice.at n=6A001334
- Numbers with exactly 4 distinct palindromic prime factors.at n=27A046402
- Smallest composite which when sum of prime factors is repeatedly subtracted reaches a prime after n iterations.at n=23A053093
- Numbers which are the sum of their proper divisors containing the digit 9.at n=37A059468
- a(n) = (n + 2/3)*2^(n-1) - 1/2 - (-1)^(n-1)*(1/6).at n=10A127980
- 1-sequence of reduction of the lower Wythoff sequence by x^2 -> x+1.at n=13A192301
- Ordered differences of central binomial coefficients.at n=34A205008
- Number of distinct values of the sum of i^2 over 8 realizations of i in 0..n.at n=39A225275
- Number of standard Young tableaux with n cells and 5 as last value in the first row.at n=8A245003
- Triangle read by rows giving certain self-avoiding walk data for the triangular lattice.at n=15A260017
- Convolution of the even-indexed triangular numbers (A014105) and the squares (A000290).at n=11A277228
- Number of integer partitions of n whose unsigned differences have the same GCD as the GCD of their parts all minus 1.at n=34A328164
- With p = prime(n), a(n) is the least composite k such that A001414(k) = p and k+p is prime, or 0 if there is no such k.at n=44A346501