Properties of the Number 12945

Twelve Thousand Nine Hundred Forty-Five

Basics

Value: 12944 → 12945 → 12946

Parity: odd

Prime: No

Previous Prime: 12941

Next Prime: 12953

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 863

Divisors: 1, 3, 5, 15, 863, 2589, 4315, 12945

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11001010010001

Octal: 31221

Duodecimal: 75A9

Hexadecimal: 3291

Square: 167573025

Square Root: 113.77609590770814

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

Numbers whose sum of divisors is a fourth power. A19422

Number of ways to write n as an ordered sum of 8 nonprime numbers. A341485

Exponents in expansion of rank-2 Artin constant product(1-1/(p³-p²), p=prime) as a product ζ(n)^-a(n). A65417

G.f.: A(x) = exp( ∑_n>=1 5ⁿ * xⁿ/(n*(1+xⁿ)) ). A259275

Number of points on surface of tricapped prism: a(n) = 7·n² + 2 for n > 0, a(0)=1. A5919

Numerators of continued fraction convergents to sqrt(749). A42442

Triangle read by rows, where t(n,1) = 1, t(n,m) = t(n,m-1) + (largest nonprime {1 or composite} in row {n-1}). A120853

Number of admissible sequences of order j; related to 5x+1 problem. A174795

a(n) is the number of distinct radii of circles passing through at least three points in a square grid of n X n points. A357301

a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = (composite numbers), t = (odd natural numbers). A24590