15243
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 15
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 20328
- Proper Divisor Sum (Aliquot Sum)
- 5085
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 10160
- Möbius Function
- 1
- Radical
- 15243
- 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
- 133
- 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
- Positive numbers k such that k and 3*k are anagrams in base 6 (written in base 6).at n=16A023065
- Euler transform of 4 3 2 1 1 1 1 1 1 1 ...at n=13A029860
- Number of partitions in parts not of the form 21k, 21k+1 or 21k-1. Also number of partitions with no part of size 1 and differences between parts at distance 9 are greater than 1.at n=45A035979
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 0, 0), (0, 1, 0), (1, -1, 1), (1, 1, -1)}.at n=9A148427
- Numerator of Laguerre(n, -11).at n=4A160566
- Smallest m such that the Moebius function takes successively, from m, n values 1,0,1,0,... ending with 1 or 0.at n=8A172436
- Smallest m such that the Moebius function takes successively, from m, n values 1,0,1,0,... ending with 1 or 0.at n=9A172436
- Smallest m such that the Moebius function takes successively, from m, n values 1,0,1,0,... ending with 1 or 0.at n=10A172436
- Permutations of 12345: Numbers having each of the decimal digits 1,...,5 exactly once, and no other digit.at n=19A178475
- G.f. satisfies: A(x) = 1+x + x^2*A( (A(x)-1-x)/x ).at n=11A193296
- Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 606", based on the 5-celled von Neumann neighborhood.at n=13A283258
- G.f. satisfies: A(x) = 1 / (1/x - 1 - A(A(x))), with A(0) = 0.at n=10A304454
- Expansion of (-1 + Product_{k>=1} 1 / (1 + (-x)^k))^3.at n=36A341241
- Distance from 10^n to the next prime triplet.at n=14A357052