Properties of the Number 12187

Twelve Thousand One Hundred Eighty-Seven

Basics

Value: 12186 → 12187 → 12188

Parity: odd

Prime: No

Previous Prime: 12163

Next Prime: 12197

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 7 × 1741

Divisors: 1, 7, 1741, 12187

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10111110011011

Octal: 27633

Duodecimal: 7077

Hexadecimal: 2f9b

Square: 148522969

Square Root: 110.39474625180313

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

Sum of distinct orders of degree-n permutations. A60179

Denominators of continued fraction convergents to sqrt(918). A42775

Number of Dyck n-paths all of whose ascents and descents have lengths equal to 1 (mod 8). A212367

Expansion of 1 / (1 - ∑_{i>=1, j>=1} x^i·j²). A327738

a(n) = number of primes < n⁴. A380331

Number of length 3 1..(n+2) arrays with no leading partial sum equal to a prime. A254541

Main diagonal of A332363. A332364

Expansion of g.f. (x⁴*(x² + 2·x + 3))/((x - 1)⁴*(x + 1)*(x² + x + 1)). A349975

G.f. A(x) satisfies: [xⁿ] A(x)ⁿ⁺¹ = [xⁿ] (1 + x·A(x)^2·n+1)ⁿ⁺¹ for n >= 0. A360345

Denominators of approximations j/k for π such that abs(j/k - π)*sqrt(5)*k² < 1. A346534