12658
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 22
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 18990
- Proper Divisor Sum (Aliquot Sum)
- 6332
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 6328
- Möbius Function
- 1
- Radical
- 12658
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 156
- Smith Number
- yes
- 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
- yes
- Odd
- no
Appears in sequences
- Numbers k such that the continued fraction for sqrt(k) has period 37.at n=30A020376
- a(n) is square mod a(i), i < n.at n=17A034791
- Triangle of number of permutations by barycenter.at n=44A062866
- Triangle read by rows: entries give numbers of permutations of [1..n] by absolute barycenter.at n=23A062867
- Number of permutations of degree n with barycenter 0.at n=8A062868
- Numbers k such that the k-th triangular number contains only digits {0,1,8}.at n=11A119046
- {2n}_{2n}.at n=55A122642
- Number of length n arrays of permutations of 0..n-1 with each element moved by -7 to 7 places and equal numbers of elements moved upwards and downwards.at n=7A263743
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 718", based on the 5-celled von Neumann neighborhood.at n=33A273427
- Expansion of Product_{k>=1} (1 + x^(2*k - 1))^(k^2).at n=20A294749
- Expansion of Sum_{k>=1} (-1 + Product_{j>=1} (1 + j*x^(k*j))).at n=19A318290
- Number of multiset partitions of uniform integer partitions of n in which all parts have the same length.at n=40A320451
- Triangle read by rows in which row n lists numbers k such that the greatest prime factor of k^2 + 2 is A033203(n), the n-th prime not congruent to 5 or 7 mod 8.at n=55A379350