13459
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
- 13816
- Proper Divisor Sum (Aliquot Sum)
- 357
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 13104
- Möbius Function
- 1
- Radical
- 13459
- 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
- 138
- 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
- Numbers (with nonzero digits only) where A046810 increases.at n=13A046811
- Number of anagrams of a(n) that are prime increases.at n=17A046888
- Numbers in base 10 that are palindromic in bases 7 and 8.at n=16A099145
- Triangle, read by rows, where row n equals the inverse binomial transform of column n in the rectangular table A124530.at n=50A124539
- Numbers that are 5-digit palindromes in at least two bases.at n=16A180454
- Numbers whose multiset multisystem (A302242) is crossing.at n=35A324170
- MM-numbers of crossing set partitions.at n=13A324324
- a(n) is the number of vertices formed by n-secting the angles of a hexagon.at n=41A335734
- Number of compositions (ordered partitions) of n into at most 6 squarefree parts.at n=25A347783
- Semiprimes of the form k^2 + 3.at n=26A360740
- Smallest natural number requiring n applications of the map x -> 2^x mod x = A015910(x) to reach 0.at n=10A372707