Properties of the Number -12816

Twelve Thousand Eight Hundred Sixteen

Basics

Value: -12817 → -12816 → -12815

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ⁴ × 3 ² × 89

Divisors: 1, 2, 3, 4, 6, 8, 9, 12, 16, 18

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

5184 Try Today's Challenge

Representations

Binary: -11001000010000

Octal: -31020

Duodecimal: -7500

Hexadecimal: -3210

Square: 164249856

Square Root: 113.20777358467925

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 e.g.f. exp(-x * (exp(x) + 1)). A356818

A triangle related to the GF(z) formulas of the rows of the ED2 array A167560. A167568

Golden rectangle numbers: F(n) * F(n+1), where F(n) = A000045(n) (Fibonacci numbers). A1654

a(n) = a(n-1) + a(n-3) + a(n-4), a(0) = a(1) = a(2) = 1, a(3) = 2. A6498

a(n) = (Lucas(4·n+3) + 1)/5, or Fibonacci(2·n+1)*Fibonacci(2·n+2), or A081015(n)/5. A81016

Antidiagonal sums of triangle A035317. A80239

T(n,k)=Number of nXk 0..2 arrays with no element equal to any value at offset (0,-2) (-1,-2) or (-2,-1) and new values introduced in order 0..2. A275090

Record (maximal) gaps between prime triples (p, p+4, p+6). A201596

a(n) = a(n-1) + a(n-3) + a(n-4), starting with a(0..3) = 1, 2, 2, 3. A70550

T(n,k)=Number of (n+1)X(k+1) arrays of permutations of 0..(n+1)*(k+1)-1 with each element having index change +-(.,.) 0,0 0,2 or 1,1. A264110