Properties of the Number 40505

Forty Thousand Five Hundred Five

Basics

Value: 40504 → 40505 → 40506

Parity: odd

Prime: No

Previous Prime: 40499

Next Prime: 40507

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 5 × 8101

Divisors: 1, 5, 8101, 40505

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1001111000111001

Octal: 117071

Duodecimal: 1B535

Hexadecimal: 9e39

Square: 1640655025

Square Root: 201.25854019146615

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

Numbers k such that k³ divides 4^k² + 1. A128678

Denominators of continued fraction convergents to sqrt(457). A41871

G.f. satisfies A(x) = 1 + x²*A(x)⁴ / (1 - x·A(x)). A365690

a(1) = 0 and a(n+1) > a(n) is the smallest integer such that a(n+1)²-a(n)² is triangular. A358416

Continued fraction for sqrt(528). A40505

Number of (n+3) X 6 0..2 arrays with every 4 X 4 subblock commuting with each horizontal and vertical neighbor 4 X 4 subblock. A186583