Properties of the Number 21169

Twenty-One Thousand One Hundred Sixty-Nine

Basics

Value: 21168 → 21169 → 21170

Parity: odd

Prime: Yes

Previous Prime: 21163

Next Prime: 21179

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 21169

Divisors: 1, 21169

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101001010110001

Octal: 51261

Duodecimal: 10301

Hexadecimal: 52b1

Square: 448126561

Square Root: 145.49570440394453

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) = ∑_i=0..n ∑_j=0..i T(i,j), T given by A026519. A26533

Array read by antidiagonals of a(n) = a(n-1)*k-((k-1)/(kⁿ)) where a(0)=1 and k=(sqrt(x²+1)+x)² for integers x>=1. A188647

Denominators of continued fraction convergents to sqrt(37). A41061

Primes of the form 9x² + 6xy + 1849y². A244019

a(n) = n⁴ + 3·n² + 1. A57721

Primes p such that x⁴⁹ = 2 has no solution mod p, but x⁷ = 2 has a solution mod p. A59667

Numbers whose square is palindromic in base 12. A29737

Primes p such that A001175(p) = (p-1)/4. A308789

a(n) = n³ - n² + 1. A100104

A variant of the cuban primes: primes p = (x³ - y³)/(x - y) where x = y + 2. A2648