Properties of the Number 15492

Fifteen Thousand Four Hundred Ninety-Two

Basics

Value: 15491 → 15492 → 15493

Parity: even

Prime: No

Previous Prime: 15473

Next Prime: 15493

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 ² × 3 × 1291

Divisors: 1, 2, 3, 4, 6, 12, 1291, 2582, 3873, 5164

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11110010000100

Octal: 36204

Duodecimal: 8B70

Hexadecimal: 3c84

Square: 240002064

Square Root: 124.46686306001288

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Number of key permutations of length n: permutations {a_i} with |a_i - a_i-1| = 1 or 2. A3274

Numbers that are the sum of eight fourth powers in exactly seven ways. A345839

G.f. 1/(1-6·x*c(x)) where c(x) is the g.f. of A000108. A127628

Ratio of each term of the primorial function to the corresponding term of the factorial function (rounded to nearest integer). A123389

a(n) = floor( ∏_i=1..n prime(i)/i ). A135568

First differences of A145646. A145647

Number of ordered triples (w,x,y) with all terms in {1,...,n} and w²+x²+y²>2n. A211644

p-INVERT of (0,1,0,1,0,1,...), where p(S) = (1 - 2 S)². A291264

Numbers whose set of base-9 digits is {2,3}. A32809

a(n) = n*(2·n² + 5·n + 19)/2. A163675