Properties of the Number -1326

Three Hundred Twenty-Six

Basics

Value: -1327 → -1326 → -1325

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 13 × 17

Divisors: 1, 2, 3, 6, 13, 17, 26, 34, 39, 51

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: Yes

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10100101110

Octal: -2456

Duodecimal: -926

Hexadecimal: -52e

Square: 1758276

Square Root: 36.41428291206625

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

G.f. satisfies: A(x) = 1/(1 + x·A(x⁵)) and also the continued fraction: 1+x·A(x⁶) = [1;1/x,1/x⁵,1/x²⁵,1/x¹²⁵,...,1/x^{5^(n-1}),...]. A101915

Expansion of ψ(-x)⁶ in powers of·where ψ() is a Ramanujan θ function. A213791

Expansion of ∏_m>=1 (1-m·q^m)²⁶. A22686

a(n) is the product of all parts in negaFibonacci representation of n. A356387

Triangular numbers: a(n) = binomial(n+1,2) = n*(n+1)/2 = 0 + 1 + 2 + ... + n. A217

Hexagonal numbers: a(n) = n*(2·n-1). A384

Products of exactly four distinct primes. A46386

a(n) = binomial(n,2): number of size-2 subsets of {0,1,...,n} that contain no consecutive integers. A161680

a(n) = a(n-1) + a(n-5); a(0) = ... = a(4) = 1. A3520

a(n) = n*(n+5). A28557