Properties of the Number 90145

Ninety Thousand One Hundred Forty-Five

Basics

Value: 90144 → 90145 → 90146

Parity: odd

Prime: No

Previous Prime: 90127

Next Prime: 90149

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 5 × 11 ² × 149

Divisors: 1, 5, 11, 55, 121, 149, 605, 745, 1639, 8195

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10110000000100001

Octal: 260041

Duodecimal: 44201

Hexadecimal: 16021

Square: 8126121025

Square Root: 300.24156940703597

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) = (2·n-1)*(13·n²-13·n+6)/6. A63493

Artiads: the primes p == 1 (mod 5) for which Fibonacci((p-1)/5) is divisible by p. A1583

A well-behaved cousin of the Hofstadter sequence: a(n) = a(n - 1 - a(n-1)) + a(n - 2 - a(n-2)) for n > 2 with a(0) = a(1) = a(2) = 1. A6949

Septic artiads: primes p congruent to 1 mod 14 for which all solutions of the congruence x³ + x² - 2x - 1 == 0 (mod p) are 7th power residues. A270800

Hyperartiads. A270798

Even-indexed terms of the binomial transform equal 1 and the odd-indexed terms of the second binomial transform equal 1. A90145

Septic hyperartiads: septic artiads (A270800) for which 7 is a 7th power residue. A270801

Artiads (A001583) congruent to 1 mod 50 and having 2 as a quintic residue. A270799

Artiads (A001583) congruent to 1 mod 50 and for which 5 is a quintic residue. A271210

Septic artiads (A270800) congruent to 1 mod 98 and for which 2 is a 7th power residue. A271263