Properties of the Number 12989

Twelve Thousand Nine Hundred Eighty-Nine

Basics

Value: 12988 → 12989 → 12990

Parity: odd

Prime: No

Previous Prime: 12983

Next Prime: 13001

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 31 × 419

Divisors: 1, 31, 419, 12989

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11001010111101

Octal: 31275

Duodecimal: 7625

Hexadecimal: 32bd

Square: 168714121

Square Root: 113.96929411029973

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 partitions of n into an odd number of parts. A27193

One half of number of non-self-conjugate partitions; also half of number of asymmetric Ferrers graphs with n nodes. A701

Number of partitions of 2n of type EO (see Comments). A236559

Number of integer partitions of n with reverse-alternating product > 1. A347449

Numbers k such that σ(k) divides σ(φ(k)). A66831

Numbers n such that σ(φ(n))/σ(n) = 3. A67383

7th binomial transform of (0,1,0,2,0,4,0,8,0,16,...). A81184

a(n) = n*(27·n + 1)/2. A22285

First differences of A037260. A37261

Odd winning positions in Fibonacci nim. A120904