11356
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 21168
- Proper Divisor Sum (Aliquot Sum)
- 9812
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 5312
- Möbius Function
- 0
- Radical
- 5678
- 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
- 130
- 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) = floor(log(n)*2^n/n).at n=15A065613
- Numbers n such that sum of squares of even digits of n equals sum of squares of odd digits of n.at n=4A076164
- Numbers such that the sum of the factorials of the digits of the cube is a square.at n=32A126076
- a(n) = RMS( A141393(0) through A141393(n) ).at n=15A141394
- 4 times heptagonal numbers: a(n) = 2*n*(5*n-3).at n=34A153784
- Difference A063990(2n)-A063990(2n-1) between amicable numbers.at n=20A178542
- Number of ordered triples (w,x,y) with all terms in {-n,...-1,1,...,n} and -1<=2w+x+y<=1.at n=44A211620
- Products of any two not necessarily distinct terms of A237424.at n=38A254143
- Number of squares of all sizes in polyominoes obtained by union of two pyramidal figures (A092498) with intersection equals A002623.at n=31A260918
- Numbers n such that n*2^1279 - 1 is prime.at n=28A265502
- G.f. = b(2)^2*b(6)/(x^7+x^6-x^5-x^2-x+1), where b(k) = (1-x^k)/(1-x).at n=16A266335
- Smallest number that is the sum of n successive primes and also the sum of n successive semiprimes, n > 1.at n=12A283873
- Number of connected induced (non-null) subgraphs of the complete binary tree with n nodes.at n=21A286304
- Greatest integer k such that k/2^n < log 2.at n=14A293362
- First differences of A063990 (amicable numbers arranged in increasing order).at n=40A306613
- a(n) is the initial transient (converted to base 10), before the periodic part, on the n-th diagonal from the left of rule-30 1-D cellular automaton, when started from a single ON cell, or -1 if there is no transient part.at n=22A364241