Properties of the Number 18126

Eighteen Thousand One Hundred Twenty-Six

Basics

Value: 18125 → 18126 → 18127

Parity: even

Prime: No

Previous Prime: 18121

Next Prime: 18127

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ² × 19 × 53

Divisors: 1, 2, 3, 6, 9, 18, 19, 38, 53, 57

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011011001110

Octal: 43316

Duodecimal: A5A6

Hexadecimal: 46ce

Square: 328551876

Square Root: 134.63283403390125

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

Integers that are Rhonda numbers to base 15. A100974

a(n) is the concatenation of n and 7n. A9441

Expansion of (η(q²) / η(q))²⁴ in powers of q. A14103

Initial members of abundant quadruplets, i.e., values of k such that (k, k+2, k+4, k+6) are all abundant numbers. A231089

Expansion of (η(q) * η(q⁴) / η(q²)²)²⁴ in powers of q. A100130

Triangle, read by rows, of the coefficients of [x^k] in G100231(x)ⁿ such that the row sums are 5ⁿ-1 for n>0, where G100231(x) is the g.f. of A100231. A100232

Triangle of coefficients of polynomials v(n,x) jointly generated with A209135; see the Formula section. A209136

Triangle read by rows: T(n,k) (n >= 5, 4 <= k <= n-1) = number of lattice 3-polytopes of width larger than 1, size n, and k vertices. A319958

Column k=8 of triangle A257673. A321953

a(n) = 625·n + 1. A158383