Properties of the Number -2485

Four Hundred Eighty-Five

Basics

Value: -2486 → -2485 → -2484

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 5 × 7 × 71

Divisors: 1, 5, 7, 35, 71, 355, 497, 2485

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100110110101

Octal: -4665

Duodecimal: -1531

Hexadecimal: -9b5

Square: 6175225

Square Root: 49.84977432245807

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

Reversion of g.f. for Fibonacci numbers 1, 1, 2, 3, 5, .... A7440

Excess of the number of even Motzkin n-paths (A107587) over the odd ones (A343386). A343773

Nearest integer to n·tan(n). A274086

G.f. A(x) satisfies: 2ⁿ - 1 = ∑_k=0..n [x^k]A(x)ⁿ and also satisfies: (2+z)ⁿ - (1+z)ⁿ + zⁿ = ∑_k=0..n [x^k](A(x)+z·x)ⁿ for all z, where [x^k]A(x)ⁿ denotes the coefficient of x^k in A(x)ⁿ. A100223

a(-1) = 1 and g.f. A(x) satisfies A(x) - 1/A(x) = 1/x - 1. A214649

Expansion of ∏_k>=1 (1 - x^k)¹⁵. A10822

a(n) = (1/720)*n*(n - 10)*(n - 1)*(n³ - 34·n² + 181·n - 144). A319932

Number of plane partitions (or planar partitions) of n. A219

Second hexagonal numbers: a(n) = n*(2·n + 1). A14105

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