Properties of the Number 21290

Twenty-One Thousand Two Hundred Ninety

Basics

Value: 21289 → 21290 → 21291

Parity: even

Prime: No

Previous Prime: 21283

Next Prime: 21313

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 × 5 × 2129

Divisors: 1, 2, 5, 10, 2129, 4258, 10645, 21290

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 101001100101010

Octal: 51452

Duodecimal: 103A2

Hexadecimal: 532a

Square: 453264100

Square Root: 145.91093173576817

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

Expansion of (1/x) * Series_Reversion( x / ((1+x)² * (1+x³*(1+x)²)) ). A387774

Starting positions of strings of three 5's in the decimal expansion of π. A83620

Decimal expansion of 1/286. A21290