13858
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 25
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 23058
- Proper Divisor Sum (Aliquot Sum)
- 9200
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 6240
- Möbius Function
- 0
- Radical
- 1066
- 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
- 151
- 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
- Three-fold convolution of primes with themselves.at n=9A014343
- Convolution of Lucas numbers and A001950.at n=13A023622
- Numerators of continued fraction convergents to sqrt(619).at n=5A042188
- Numbers whose base-7 representation contains exactly four 5's.at n=12A043416
- Triangle of coefficients in expansion of enumerators for series-reduced rooted trees by lines at the root.at n=65A058735
- Main diagonal of A058735.at n=10A058737
- Number of partitions of n such that multiplicities of parts are divisors of n.at n=45A100932
- Triangle read by rows: T(n,m) = number of unlabeled cographs on n nodes with m connected components.at n=67A106240
- a(n) = 625n^2 - 364n + 53.at n=4A157621
- Number of ways to place 2 non-attacking wazirs on an n X n toroidal board.at n=12A201236
- Beach-Williams Pell numbers of type 2pqr (p,q,r primes).at n=1A212076
- Numbers k such that 6^k - 7 is prime.at n=26A217352
- Numbers that are representable in at least two ways as sums of four distinct nonvanishing cubes.at n=4A259060
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 41", based on the 5-celled von Neumann neighborhood.at n=27A269874
- Expansion of Sum_{k>=1} ((1 + k * x^k)^k - 1).at n=25A327238
- Indices of records in A333537.at n=12A333538
- Numbers k such that k divides the sum of digits in primorial base of all numbers from 1 to k.at n=30A333703
- Number of compositions (ordered partitions) of n into an even number of triangular numbers.at n=25A339416
- Numbers k such that the equation x^2 - k*y^4 = -1 has a solution for which |y| > 2.at n=13A356488
- Third Lie-Betti number of a cycle graph on n vertices.at n=38A363378