14221
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 10
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 14222
- Proper Divisor Sum (Aliquot Sum)
- 1
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 14220
- Möbius Function
- -1
- Radical
- 14221
- Omega Function (Ω)
- 1
- Little Omega Function (ω)
- 1
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
- 120
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- yes
- Composite Number
- no
- Semiprime
- no
- Squarefree Number
- yes
- Prime Power
- yes
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Prime Index
- 1672
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- a(n) = 7^n - 3*4^n + 2*3^n.at n=4A002501
- Numbers k such that (7^k - 1)/6 is prime.at n=5A004063
- Primes that remain prime through 3 iterations of function f(x) = 9x + 8.at n=34A023298
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 98 ones.at n=5A031866
- Primes p whose period of reciprocal equals (p-1)/5.at n=27A056210
- Primes p such that q-p = 22, where q is the next prime after p.at n=26A061779
- Prime numbers in A092063.at n=11A092064
- Number of connected relations.at n=2A093732
- Number of distinct values taken by the sums of all subsets of the n-th roots of unity.at n=14A107861
- Consider primes p such that integer part of the volume of cube with faces of area p is prime; sequence gives integer part of volumes.at n=12A107989
- Sum of the squares of the first n squarefree numbers.at n=26A111715
- Prime values of integers written in factorial base, interpreted as in base 10.at n=35A121402
- Triangle read by rows: T(n,k) = number of specially labeled bicolored connected graphs with k points in one color class and n-k points in the other class . "Special" means there are separate labels 1,2, ...,k and 1,2, ...,n-k for the two color classes (n >= 1, k = floor((n+1)/2), ..., n).at n=20A123260
- Prime numbers, isolated from neighboring primes by more than 12.at n=37A137873
- Primes of the form x^2 + 1365*y^2.at n=36A139667
- Primes congruent to 35 mod 41.at n=37A142232
- Primes congruent to 31 mod 43.at n=41A142280
- Primes congruent to 27 mod 47.at n=36A142378
- Primes congruent to 17 mod 53.at n=35A142547
- Primes congruent to 2 mod 59.at n=30A142729