Properties of the Number 242

Two Hundred Forty-Two

Basics

Value: 241 → 242 → 243

Parity: even

Prime: No

Previous Prime: 241

Next Prime: 251

Digit Sum: 8

Digital Root: 8

Palindrome: Yes

Factorization: 2 × 11 ²

Divisors: 1, 2, 11, 22, 121, 242

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 11110010

Octal: 362

Duodecimal: 182

Hexadecimal: f2

Square: 58564

Square Root: 15.556349186104045

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

Palindromes in base 10. A2113

Numbers k such that (266·10^k + 1)/3 is prime. A269303

Numbers that are the product of exactly three (not necessarily distinct) primes. A14612

a(n) = 2·n². A1105

a(n) = prime(n) + 1. A8864

Number of partitions of n into an even number of parts. A27187

Squares and twice squares. A28982

Sum of totient function: a(n) = ∑_k=1..n φ(k), cf. A000010. A2088

a(n) = ceiling(n²/2). A982

Numbers m such that 6m-1, 6m+1 are twin primes. A2822