Properties of the Number 21962

Twenty-One Thousand Nine Hundred Sixty-Two

Basics

Value: 21961 → 21962 → 21963

Parity: even

Prime: No

Previous Prime: 21961

Next Prime: 21977

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 79 × 139

Divisors: 1, 2, 79, 139, 158, 278, 10981, 21962

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101010111001010

Octal: 52712

Duodecimal: 10862

Hexadecimal: 55ca

Square: 482329444

Square Root: 148.19581640518737

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

Numbers k such that 15·2^k - 1 is prime. A2237

Number of ordered triples (w,x,y) with all terms in {1,...,n} and w²>x²+y². A211637

Number of (unlabeled) rooted trees with n leaf nodes and without unary nodes or outdegrees larger than ten. A292216

a(n) is the smallest positive integer of length (distance from origin) n in the Cayley graph of the integers generated by all powers of 11. A297181

The array of A059578 read by antidiagonals in the 'up' direction. A59579

a(n) is the least·such that the cyclotomic polynomial values φ(d,x) are prime for all d dividing n. A72942

a(n) = (3·11ⁿ+1)/2. A199751

Decimal expansion of 1/958. A21962