Properties of the Number 1286

One Thousand Two Hundred Eighty-Six

Basics

Value: 1285 → 1286 → 1287

Parity: even

Prime: No

Previous Prime: 1283

Next Prime: 1289

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 × 643

Divisors: 1, 2, 643, 1286

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10100000110

Octal: 2406

Duodecimal: 8B2

Hexadecimal: 506

Square: 1653796

Square Root: 35.86084215408221

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

Number of reduced words of length n in the Weyl group D₁₂. A162297

Number of solutions to c(1)*prime(1) +...+ c(2n+1)*prime(2n+1) = 0, where c(i) = +-1 for i > 1, c(1) = 1. A22894

Q-toothpick sequence (see Comments for precise definition). A187210

Numbers that are the sum of 11 positive 8th powers. A3389

Number of integer partitions of n without choosable initial intervals. A387118

Interprimes (A024675) which are of the form s·prime, s=2. A75277

Number of integer partitions of n with all pairs of consecutive parts relatively prime. A328172

Number of reduced words of length n in the Weyl group B₁₂. A161858

Numbers that are the sum of 3 nonzero squares in 10 or more ways. A25338

Triangle of coefficients T(n,k) in g.f. A(x,y) satisfying ∑_n=-oo..+oo (xⁿ - y·A(x,y))ⁿ = 1 - (y-2)*∑_n>=1 x^n², for n >= 1, as read by rows. A370041