Properties of the Number 12920

Twelve Thousand Nine Hundred Twenty

Basics

Value: 12919 → 12920 → 12921

Parity: even

Prime: No

Previous Prime: 12919

Next Prime: 12923

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 ³ × 5 × 17 × 19

Divisors: 1, 2, 4, 5, 8, 10, 17, 19, 20, 34

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11001001111000

Octal: 31170

Duodecimal: 7588

Hexadecimal: 3278

Square: 166926400

Square Root: 113.66617790706258

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

Layer counting sequence for hyperbolic tessellation by regular pentagons of angle π/2. A54888

Fibonacci sequence beginning 0, 5. A22088

Expansion of (1-4·x)^5/2. A2422

Expansion of (1-4·x)^7/2. A2423

a(n) = n*(8·n+3). A139276

Number of compositions (ordered partitions) of n into distinct parts, the least being 2. A339163

Numbers k such that the central binomial coefficient C(2k,k) is divisible by k². A121943

a(n) = 3·a(n-2) - a(n-4), a(0)=0, a(1)=1, a(2)=5, a(3)=4. A203976

Magic sums of 4 X 4 magic squares composed of squares. A271580

Series reversion of y + y² + y³. A103779