Properties of the Number -4187

One Hundred Eighty-Seven

Basics

Value: -4188 → -4187 → -4186

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 53 × 79

Divisors: 1, 53, 79, 4187

Polygonal

Triangular: No

Square: No

Pentagonal: Yes

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

5184 Try Today's Challenge

Representations

Binary: -1000001011011

Octal: -10133

Duodecimal: -250B

Hexadecimal: -105b

Square: 17530969

Square Root: 64.70703207534712

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/(1 - x + 4·x²). A106853

Expansion of (1 + 4·x)/(1 + 7·x + 16·x²). A87170

a(n) = 2·n² - n + 1. A130883

Smallest palindrome greater than n in bases n and n+1. A48268

Numbers k such that σ(k+2) = σ(k). A7373

Pentagonal numbers with odd index: a(n) = (2·n+1)*(3·n+1). A33570

Pseudoprimes to base 10. A5939

Composite numbers k coprime to 13 such that k divides A006190(k-Kronecker(13,k)). A327653

a(n) = (9n² + 9n + 4)/2. A62123

Odd composite integers m such that A006497(m) == 3 (mod m). A335669