Properties of the Number 12505

Twelve Thousand Five Hundred Five

Basics

Value: 12504 → 12505 → 12506

Parity: odd

Prime: No

Previous Prime: 12503

Next Prime: 12511

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 5 × 41 × 61

Divisors: 1, 5, 41, 61, 205, 305, 2501, 12505

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11000011011001

Octal: 30331

Duodecimal: 72A1

Hexadecimal: 30d9

Square: 156375025

Square Root: 111.8257573191436

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 m such that there are precisely 7 groups of order m. A249550

Number of fully normal integer partitions of n. A317491

Vampire numbers: (definition 1): n has a nontrivial factorization using n's digits. A20342

5 times pentagonal numbers: 5·n*(3·n-1)/2. A152734

a(n) = 1 + (n-1) + (n-2)*[(n-3)/2] + (n-3)*[(n-4)/2]*[(n-5)/3] + (n-4)*[(n-5)/2]*[(n-6)/3]*[(n-7)/4] +... where [x] = floor(x), with summation extending over the initial [n/2+1] products only. A207644

Numerators of the squared radii corresponding to circular disks covering record numbers of grid points A346993 of the square lattice. A346994

Rounded total surface area of a regular icosahedron with edge length n. A71398

a(n) = ∑_k=1..n n^{n/gcd(n, k}). A332620

Number of distinct quintic residues x⁵ (mod 5ⁿ), x=0..5ⁿ-1. A365104

Number of Goldbach partitions of 6ⁿ. A180007