Properties of the Number 18121

Eighteen Thousand One Hundred Twenty-One

Basics

Value: 18120 → 18121 → 18122

Parity: odd

Prime: Yes

Previous Prime: 18119

Next Prime: 18127

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 18121

Divisors: 1, 18121

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011011001001

Octal: 43311

Duodecimal: A5A1

Hexadecimal: 46c9

Square: 328370641

Square Root: 134.6142637315972

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

Primes with 23 as smallest positive primitive root. A61335

Initial term in sequence of four consecutive primes separated by 3 consecutive differences each <=6 (i.e., when d=2,4 or 6) and forming d-pattern=[6, 4,2]; short d-string notation of pattern = [642]. A78855

Primes p for which the period of reciprocal = (p-1)/8. A56213

First member of a prime quadruple in a 2p-1 progression. A57327

Primes p such that A001177(p) = (p-1)/8. A308801

Primes having only {1, 2, 8} as digits. A385775

Smallest primes starting a complete three iterations Cunningham chain of the second kind. A110024

Smallest prime factor of composite Mersenne numbers: lpf(2^p-1) where 2^p-1 is composite and p is prime. A136030

a(n) is the number of integer partitions of n for which the smallest part is equal to the index of the seaweed algebra formed by the integer partition paired with its weight. A318196

Primes p such that p - 2 and p³ - 2 are also prime. A240126