242565 has 16 divisors (see below), whose sum is σ = 394368. Its totient is φ = 127296.

The previous prime is 242551. The next prime is 242591. The reversal of 242565 is 565242.

It is not a de Polignac number, because 242565 - 2⁵ = 242533 is a prime.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 242565.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1467 + ... + 1623.

It is an arithmetic number, because the mean of its divisors is an integer number (24648).

2²⁴²⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

242565 is a deficient number, since it is larger than the sum of its proper divisors (151803).

242565 is a wasteful number, since it uses less digits than its factorization.

242565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268.

The product of its digits is 2400, while the sum is 24.

The square root of 242565 is about 492.5088831686. The cubic root of 242565 is about 62.3652563819.

The spelling of 242565 in words is "two hundred forty-two thousand, five hundred sixty-five".