Properties of the Number -1445

Four Hundred Forty-Five

Basics

Value: -1446 → -1445 → -1444

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 5 × 17 ²

Divisors: 1, 5, 17, 85, 289, 1445

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10110100101

Octal: -2645

Duodecimal: -A05

Hexadecimal: -5a5

Square: 2088025

Square Root: 38.01315561749642

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

E.g.f. satisfies A(x) = exp(x·A(-x)). A141369

Shifts left when Moebius transformation applied twice. A7551

a(n) = n² + 1. A2522

Apery (Apéry) numbers: ∑_k=0..n (binomial(n,k)*binomial(n+k,k))². A5259

Odd numbers of the form p^1+4k * r², where p is prime of the form 1+4m, r > 1, and gcd(p,r) = 1. (Euler's criteria for odd perfect numbers). A228058

Arithmetic derivative of the primorial base exp-function: a(n) = A003415(A276086(n)). A327860

a(n) = 4·n² + 1. A53755

Square array, read by antidiagonals, where row n equals the crystal ball sequence for the 2·n-dimensional lattice A_n x A_n. A143007

Perfect powers (squares, cubes, etc., not including 1) plus 1. A216765

a(n) = 5·n². A33429