11615
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 14688
- Proper Divisor Sum (Aliquot Sum)
- 3073
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 8800
- Möbius Function
- -1
- Radical
- 11615
- Omega Function (Ω)
- 3
- 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
- 112
- 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
- no
- Odd
- yes
Appears in sequences
- a(n) = n-th prime number * n-th lucky number.at n=25A032601
- Numbers k such that k divides the (right) concatenation of all numbers <= k written in base 14 (most significant digit on right).at n=15A061943
- Numbers of unstrained alkane staggered conformers (acyclic) of the unbranched type for point group C1. See Table 4 of the Cyvin et al. reference for precise definition.at n=10A126877
- a(n) = 6*n^2 - 1.at n=44A140811
- a(n) = n^3 - n^2 - n.at n=23A152015
- a(n) = 484*n - 1.at n=23A158330
- a(n) = 24*n^2 - 1.at n=21A158544
- a(n) = smallest number m such that m^2 and n^2 share no common digits and m^2 and n^2 together use all 10 digits, a(n) = 0 if no such m exists.at n=25A158931
- Multiples of 23 whose digit reversal + 1 is also a multiple of 23.at n=19A166393
- Numbers k such that 3k-4, 3k-2, 3k+2, and 3k+4 are primes.at n=23A173092
- G.f. satisfies: A(x) = 1/(1 - x*A(x)/(1 - x^2*A(x)/(1 - x^3*A(x)/(1 - x^4*A(x)/(1 - ...))))), a recursive continued fraction.at n=9A192728
- Number of rooted identity trees with n nodes and exactly 7 subtrees from the root.at n=6A227811
- Intersection of A003052 and A283002.at n=24A283003
- a(n) is the number of vertices formed by n-secting the angles of a pentagon.at n=44A335554
- a(n) is the minimum number of squares from which an n-fold totally concave polyomino (n-TCP) can be made.at n=42A385602