Properties of the Number 12391

Twelve Thousand Three Hundred Ninety-One

Basics

Value: 12390 → 12391 → 12392

Parity: odd

Prime: Yes

Previous Prime: 12379

Next Prime: 12401

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 12391

Divisors: 1, 12391

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11000001100111

Octal: 30147

Duodecimal: 7207

Hexadecimal: 3067

Square: 153536881

Square Root: 111.31486872830601

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

Wagstaff numbers: numbers k such that (2^k + 1)/3 is prime. A978

Primes whose reversal is a square. A7488

Primes of the form 210n + 1. A73102

Numbers k such that 2^k + 1 is a semiprime. A92559

Mountain primes. A134951

Indices of prime Jacobsthal numbers. A107036

Smallest prime having least positive primitive root n, or 0 if no such prime exists. A23048

Sum of positive cranks minus the sum of positive ranks of all partitions of n. A195012

Expansion of ∏_k>=1 1 / (1 - 6^k-1*x^k). A338675

Primes p such that 2p²-1 and 3p²-2 are also prime. A213078