Properties of the Number -4186

One Hundred Eighty-Six

Basics

Value: -4187 → -4186 → -4185

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 × 7 × 13 × 23

Divisors: 1, 2, 7, 13, 14, 23, 26, 46, 91, 161

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: Yes

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1000001011010

Octal: -10132

Duodecimal: -250A

Hexadecimal: -105a

Square: 17522596

Square Root: 64.69930447848725

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 1/(∑_i>=0 q^2·i*(i+1)/∏_j=0..i (1 - q^2·j+1)²). A294599

A symmetrical triangle sequence:t(n,m)=(-1)^m*(n - m)!*Binomial[n - 1, m] + (-1)^{n - m + 1}*(n - (n - m + 1))!*Binomial[n - 1, n - m + 1]. A176862

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

Number of partitions of n into an even number of parts. A27187

Doubly triangular numbers: a(n) = n*(n+1)*(n²+n+2)/8. A2817

Centered 9-gonal (also known as nonagonal or enneagonal) numbers. Every third triangular number, starting with a(1)=1. A60544

Number of partitions of 2n of type EE (see Comments). A236913

Number of cycle types of conjugacy classes of all even permutations of n elements. A46682

13-gonal (or tridecagonal) numbers: a(n) = n*(11·n - 9)/2. A51865

Number of hierarchical ordered partitions of partitions. A141199