Properties of the Number 12087

Twelve Thousand Eighty-Seven

Basics

Value: 12086 → 12087 → 12088

Parity: odd

Prime: No

Previous Prime: 12073

Next Prime: 12097

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 17 × 79

Divisors: 1, 3, 9, 17, 51, 79, 153, 237, 711, 1343

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10111100110111

Octal: 27467

Duodecimal: 6BB3

Hexadecimal: 2f37

Square: 146095569

Square Root: 109.94089321085217

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

Expansion of g.f. (1-x²)/(1-x-2·x²+x³). A28495

Numbers k such that the digits of σ(k) are a permutation of those of k, in base 10. A115920

T(n,k)=Number of length (n+k)X1 arrays of occupancy after each element moves up to +-k places including 0. A222345

Row sums of triangle A060556. A60557

a(n) = ∑_d∣n d³*A000593(n/d). A288419

Let i be in {1,2,3} and let r >= 0 be an integer. Let p = {p₁, p₂, p₃} = {-2,0,1}, n = 2·r + p_i and define a(-2)=0. Then, a(n) = a(2·r + p_i) gives the quantity of H_7,3,0 tiles in a subdivided H_7,i,r tile after linear scaling by the factor x^r, where x = sqrt(2·cos(π/7)). A187067

The sums of pairs of adjacent terms are the odd palindromic primes in ascending order. A181881

a(n) = ∑_k=1..n (binomial(n, k) * 3^k) (mod 4^k). A386662

Expansion of (1/x) * Series_Reversion( x / (1 + x³ / (1 - x)²) ). A389249

Indices of zeros in A269783. A269967