Properties of the Number 15986

Fifteen Thousand Nine Hundred Eighty-Six

Basics

Value: 15985 → 15986 → 15987

Parity: even

Prime: No

Previous Prime: 15973

Next Prime: 15991

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 2 × 7993

Divisors: 1, 2, 7993, 15986

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 11111001110010

Octal: 37162

Duodecimal: 9302

Hexadecimal: 3e72

Square: 255552196

Square Root: 126.43575443678897

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 partitions with no even part repeated; partitions of n in which no parts are multiples of 4. A1935

Twice-partitioned numbers where the first partition is strict and the latter partitions are constant. A279786

Expansion of ψ(x) / φ(x) in powers of·where φ(), ψ() are Ramanujan θ functions. A83365

T(n,k)=Number of nXk 0..1 arrays with every element equal to 2, 3, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A300776

Triangle read by rows: T(n, k) = n! * 2^k * hypergeom([-k], [-n], 1/2). A374428

a(n) is the number of complement pairs of 2n-bead balanced bicolor necklaces. A386388

Number of partitions of 2n in which no parts are multiples of 4. A81055

Greatest number m such that the fractional part of (1024/1000)^A153680(n) >= 1-(1/m). A153684

a(n) is the number of complement pairs of primitive 2n-bead balanced binary necklaces. A383904

a(n) is the number of complement pairs of imprimitive (periodic) 2n-bead balanced binary necklaces. A387130