Properties of the Number -132771

One Hundred Thirty-Two Thousand Seven Hundred Seventy-One

Basics

Value: -132772 → -132771 → -132770

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 44257

Divisors: 1, 3, 44257, 132771

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100000011010100011

Octal: -403243

Duodecimal: -64A03

Hexadecimal: -206a3

Square: 17628138441

Square Root: 364.37755144904304

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) = ∑_{k=0..floor(n/2)} binomial(3·n-k,n-2·k). A371742

a(n) = T(n, 2·n-7), T given by A027926. A27930

a(0) = 1, a(1) = 3; a(n+2) = (a(n+1) + a(n))/2 if 2 divides (a(n+1) + a(n)), a(n+2) = a(n+1) + a(n) otherwise. A151749

Having specified two initial terms, the "Half-Fibonacci" sequence proceeds like the Fibonacci sequence, except that the terms are halved before being added if they are even. A120424

Dirichlet convolution of Catalan numbers with Bell numbers. A34769