Properties of the Number 12581

Twelve Thousand Five Hundred Eighty-One

Basics

Value: 12580 → 12581 → 12582

Parity: odd

Prime: No

Previous Prime: 12577

Next Prime: 12583

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 23 × 547

Divisors: 1, 23, 547, 12581

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11000100100101

Octal: 30445

Duodecimal: 7345

Hexadecimal: 3125

Square: 158281561

Square Root: 112.16505694733989

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

The first Fibonacci based variant of arithmetic derivative: a(p) = A000045(p) for prime p, a(u·v) = a(u)*v + u·a(v), with a(0) = a(1) = 0. A328845

Average of terms of n-th row of A077321. A77325

Number of vertices among all distinct circles that can be constructed from a point on the origin and n equally spaced points on each of the +x,-x,+y,-y coordinates axes when each pair of points is connected by a circle and where the points lie at the ends of the circles' diameter. A362233

Numbers k such that k and k² use only the digits 1, 2, 5, 6 and 8. A137005

a(n) = 9·n² - 11·n + 3. A214660

Number of (n+2) X (1+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00010101 00101011 or 01010101. A260920

Numbers m such that the minimal value of abs(2^m - 3^x) > 0 is prime (i.e., m such that A064024(m) is prime). A73073

Number of partitions of n such that (number of distinct parts) = multiplicity of the least part. A239962

cosh(arcsinh(x)*log(x+1))=1+12/4!*x⁴-60/5!*x⁵+210/6!*x⁶... A12581