Properties of the Number -2861

Eight Hundred Sixty-One

Basics

Value: -2862 → -2861 → -2860

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2861

Divisors: 1, 2861

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101100101101

Octal: -5455

Duodecimal: -17A5

Hexadecimal: -b2d

Square: 8185321

Square Root: 53.48831648126533

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 (1/3) * (c(q)² / c(q²)) / (b(q²)² / b(q)) in powers of q where b(), c() are cubic AGM θ functions. A128641

Expansion of f(x, x⁵) * f(-x⁶) / f(x)² in powers of·where f() is a Ramanujan θ function. A254346

Expansion of c(q) * c(q³) / c(q²)² in powers of q where c() is a cubic AGM θ function. A258100

Expansion of c(q³) / (c(q³) + c(q⁶)) where c() is a cubic AGM function. A145977

List of coefficients of chromatic polynomial of Petersen graph, highest order terms first. A296912

Dirichlet g.f.: ζ(s) / (ζ(s-1) * ζ(s-2)). A351654

Primes whose decimal representation is a valid number in base 9 and interpreted as such is again a prime. A235395

Primes of the form k² - k - 1. A2327

Number of strict integer partitions of n containing some three possibly equal parts (a,b,c) such that a + b = c. A variation of sum-full strict partitions. A363226

Number of strict integer partitions of n with at least one neighborless part. A356607