Properties of the Number 21299

Twenty-One Thousand Two Hundred Ninety-Nine

Basics

Value: 21298 → 21299 → 21300

Parity: odd

Prime: No

Previous Prime: 21283

Next Prime: 21313

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 19 ² × 59

Divisors: 1, 19, 59, 361, 1121, 21299

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001100110011

Octal: 51463

Duodecimal: 103AB

Hexadecimal: 5333

Square: 453647401

Square Root: 145.94176920950355

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 ∏_k>=1 1/(1 - x^k)^k*(3·k+1/2). A294667

Number of lines through at least 2 points of a 9 X n grid of points. A160849

a(n) = numerator(∑_k=1..n d(k+1)/d(k)), where d is the number of divisors function. A386925

Numerator of the sum of the reciprocals of all square divisors of all positive integers <= n. A384817

Number of 4 X n 0..2 arrays with diagonals and antidiagonals unimodal and rows nondecreasing. A224355

Number of (6+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 5 6 or 7. A252685

Decimal expansion of 1/295. A21299