14318
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 21480
- Proper Divisor Sum (Aliquot Sum)
- 7162
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 7158
- Möbius Function
- 1
- Radical
- 14318
- 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
- 76
- 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
- yes
- Odd
- no
Appears in sequences
- Integer part of ((4th elementary symmetric function of 1,2,..,n)/(2nd elementary symmetric function of 1,2,...,n)).at n=28A024173
- Least non-balanced x (i.e., not in A020492) such that sigma(p(n),x)/phi(x) is an integer, where p(n) = n-th prime.at n=34A078540
- a(0) = 1; for n > 0, a(n) = b(n) - n*b(n-1), b() = A076177().at n=10A092255
- Numbers k such that k!! - prime(k) is prime.at n=13A108420
- Expansion of (1-x-2x^2+sqrt(1-2x-3x^2))/(2*(1-2x-3x^2)).at n=10A116410
- a(1)=2. For n >=2, a(n) = the least integer >= a(n-1) that is not coprime to both a(n-1)+1 and a(n-1).at n=28A140525
- Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in two by two blocks.at n=10A145858
- Numbers n with property that n^2 is a sum of some 120 successive primes.at n=6A166262
- Number of n X 5 binary arrays with each 1 adjacent to exactly one 1 vertically and one 1 horizontally.at n=10A183337
- Number A(n,k) of solid standard Young tableaux of cylindrical shape lambda X k, where lambda ranges over all partitions of n; square array A(n,k), n>=0, k>=0, read by antidiagonals.at n=32A215204
- Number of n-node unlabeled rooted trees with thickening limbs and root outdegree (branching factor) 7.at n=50A245147
- Number of solid standard Young tableaux of cylindrical shape lambda X 3, where lambda ranges over all partitions of n.at n=4A290202
- Numbers k such that (22*10^k - 73)/3 is prime.at n=18A293035
- Numbers n such that n^2 + 1 can be expressed as j^2 + k^2, j > k > 1, in more ways than for any smaller n.at n=10A300161
- Numbers k such that sigma(k)! - 1 is prime, where sigma is A000203.at n=19A309548
- The internal state of the Sinclair ZX81 and Spectrum random number generator.at n=35A357907