Properties of the Number -1086

Eighty-Six

Basics

Value: -1087 → -1086 → -1085

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 181

Divisors: 1, 2, 3, 6, 181, 362, 543, 1086

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10000111110

Octal: -2076

Duodecimal: -766

Hexadecimal: -43e

Square: 1179396

Square Root: 32.95451410656816

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

a(n) = ∑_d∣n (-1)^d-1*d². A321543

G.f.: ∑_n=-oo..+oo x^n² / (1 - xⁿ)ⁿ. A261605

Sequence is {a(4,n)}, where a(m,n) is defined at sequence A110665. A110669

Imbalance of the sum of parts of all partitions of n. A194797

a(n) = Sum[d∣n, d==1 (mod 3), d²] - Sum[d∣n, d==2 (mod 3), d²]. A103440

Expansion of (b(q³)³ - b(q)³) / 9 in powers of q where b() is a cubic AGM θ function. A181905

Expansion of b(q) * c(q³)² / 9 in powers of q where b(), c() are cubic AGM θ functions. A181977

Smith (or joke) numbers: composite numbers k such that sum of digits of k = sum of digits of prime factors of k (counted with multiplicity). A6753

Numbers k such that the k-th partition number A000041(k) is prime. A46063

a(n) = n² - 3. A28872