Properties of the Number 21742

Twenty-One Thousand Seven Hundred Forty-Two

Basics

Value: 21741 → 21742 → 21743

Parity: even

Prime: No

Previous Prime: 21739

Next Prime: 21751

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 × 7 × 1553

Divisors: 1, 2, 7, 14, 1553, 3106, 10871, 21742

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101010011101110

Octal: 52356

Duodecimal: 106BA

Hexadecimal: 54ee

Square: 472714564

Square Root: 147.45168700289597

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

The internal state of the Sinclair ZX81 and Spectrum random number generator. A357907

Positions of records in A268672. A268713

The fixed points of A355702. A356017

(n,3,4) difference families over Z_n. A11994

Numbers k such that 161·2^k-1 is prime. A50832

Numbers k such that (52·10^k - 1)/3 is prime. A282508

Decimal expansion of 1/738. A21742