14257
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 14580
- Proper Divisor Sum (Aliquot Sum)
- 323
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 13936
- Möbius Function
- 1
- Radical
- 14257
- 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
- 120
- 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
- a(n) = smallest k such that the digit sum of 7k is n.at n=41A077494
- Greatest multiple of the n-th prime in A098962.at n=15A099620
- Concatenate n and the sum of the digits of n raised to their own power (A045503).at n=14A108302
- a(n) = floor(sqrt(pi(2^n))).at n=32A133498
- Numbers which yield a prime whenever a 3 is prefixed, appended or inserted.at n=46A158594
- a(n) = 44*n^2 + 1.at n=18A158630
- Positive numbers y such that y^2 is of the form x^2+(x+617)^2 with integer x.at n=6A160176
- a(0) = 0 and a(n) = (4*n^3 - 12*n^2 + 20*n - 9)/3 for n >= 1.at n=23A174794
- Number of n X 4 0..4 arrays with each element equal to the number its horizontal and vertical neighbors within one of itself.at n=11A196013
- a(n) = 11*6^n+1.at n=4A199415
- Number A(n,k) of n X k nonconsecutive tableaux; square array A(n,k), n>=0, k>=0, read by antidiagonals.at n=51A214021
- Number of n X 3 nonconsecutive tableaux.at n=6A214159
- Composite numbers and 1 which yield a prime whenever a 3 is inserted anywhere in them (including at the beginning or end).at n=22A216166
- Number of 4 X n 0..1 arrays with diagonals and rows unimodal and antidiagonals nondecreasing.at n=8A224160
- Expansion of Product_{k>=1} 1/(1-x^(4*k-3))^k.at n=54A263137
- Irregular table read by rows, T(n, k) is the rank of the k-th Seidel permutation of {1,...,n}, permutations sorted in lexicographical order.at n=25A347600
- Centered 27-gonal numbers.at n=32A389797