Properties of the Number 21292

Twenty-One Thousand Two Hundred Ninety-Two

Basics

Value: 21291 → 21292 → 21293

Parity: even

Prime: No

Previous Prime: 21283

Next Prime: 21313

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 5323

Divisors: 1, 2, 4, 5323, 10646, 21292

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001100101100

Octal: 51454

Duodecimal: 103A4

Hexadecimal: 532c

Square: 453349264

Square Root: 145.91778507090902

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(1) = 0, a(2) = 1, and for n > 2, a(n) = 2·a(A252463(n)) + [n == 1 (mod 4)]. A292385

Number of normal patterns contiguously matched by integer partitions of n. A335838

T(n,k) = Number of n X k 0..1 arrays with every element equal to 0, 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero. A299221

T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 2, 3, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero. A300035

Number of nX3 0..1 arrays with every element equal to 0, 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero. A299216

a(n) = a(1) + a(2) + ... + a(n-1) - a(m) for n >= 4, where m = n - 1 - 2^p and p is the unique integer such that 2^p < n - 1 <= 2^p+1, starting with a(1) = 1 and a(2) = a(3) = 3. A49926

Decimal expansion of 1/288. A21292