Properties of the Number 12321

Twelve Thousand Three Hundred Twenty-One

Basics

Value: 12320 → 12321 → 12322

Parity: odd

Prime: No

Previous Prime: 12301

Next Prime: 12323

Digit Sum: 9

Digital Root: 9

Palindrome: Yes

Factorization: 3 ² × 37 ²

Divisors: 1, 3, 9, 37, 111, 333, 1369, 4107, 12321

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11000000100001

Octal: 30041

Duodecimal: 7169

Hexadecimal: 3021

Square: 151807041

Square Root: 111

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

Squares of the squarefree semiprimes (p²*q²). A85986

Palindromic squares. A2779

a(n) is obtained by starting with 1, sequentially concatenating all decimal numbers up to n, and then, starting from n-1, sequentially concatenating all decimal numbers down to 1. A173426

Wonderful Demlo numbers: a(n) = ((10ⁿ - 1)/9)². A2477

Numbers m such that m divides 10^m - 1. A14950

Squares in which parity of digits alternates. A30152

a(n) = (3·n)². A16766

Palindromic in bases 10 and 36. A250412

Squares n² such that floor(n²/9) is again a square. A204503

Numbers with 9 divisors. A30627