Properties of the Number -445

Four Hundred Forty-Five

Basics

Value: -446 → -445 → -444

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 5 × 89

Divisors: 1, 5, 89, 445

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110111101

Octal: -675

Duodecimal: -311

Hexadecimal: -1bd

Square: 198025

Square Root: 21.095023109728988

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

Dirichlet inverse of A006369, the inverse permutation of "amusical permutation". A349368

Table T(n,k) = -2·T(n-1,k)+T(n-1,k+1) = T(n,k-4), 0<=n. A140287

Alternating sum of octagonal pyramidal numbers. A269429

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 145", based on the 5-celled von Neumann neighborhood. A270289

Said to have been posted at the web site mturk.amazon.com as a puzzle. A124170

First differences of A138383. A137174

Triangle read by rows: T(n,k) appears in the transformation ∑_k=0..n (k+1)*x^k = ∑_k=0..n T(n,k)*(x+3k)^k. A253384

Number of Look-and-Say partitions of n; see Comments. A239455

Number of condensed integer partitions of n. A239312

a(n) = 10·n + 5. A17329