11755
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 14112
- Proper Divisor Sum (Aliquot Sum)
- 2357
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 9400
- Möbius Function
- 1
- Radical
- 11755
- Omega Function (Ω)
- 2
- 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
- 156
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- 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
- no
- Odd
- yes
Appears in sequences
- Number of similarity classes of triangles which can be drawn using the lattice points in an n X n grid for vertices.at n=17A028492
- Numbers having four 1's in base 9.at n=31A043460
- a(1)=1; a(n+1) = Sum_{k=1 to n} a(k) a(ceiling(n/k)).at n=11A097919
- Numbers k such that 19^k - 2 is a prime.at n=11A128460
- Regular coverings having dihedral voltage groups: see Kwak-Lee reference in A160870 for precise definition.at n=3A160878
- a(n) is largest semiprime < 2*a(n-1), with a(1) = 4.at n=13A217836
- First differences of A063990 (amicable numbers arranged in increasing order).at n=25A306613
- Number of integer partitions of n whose parts plus 1 are relatively prime.at n=33A318980
- Number of graph minors in the cycle graph C_n.at n=23A353206