242858 has 32 divisors (see below), whose sum is σ = 483840. Its totient is φ = 88560.

The previous prime is 242819. The next prime is 242863. The reversal of 242858 is 858242.

It is a Curzon number.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 242858.

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 242858.

It is an unprimeable number.

242858 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2885 + ... + 2967.

It is an arithmetic number, because the mean of its divisors is an integer number (15120).

2²⁴²⁸⁵⁸ is an apocalyptic number.

242858 is a deficient number, since it is larger than the sum of its proper divisors (240982).

242858 is a wasteful number, since it uses less digits than its factorization.

242858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122.

The product of its digits is 5120, while the sum is 29.

The square root of 242858 is about 492.8062499604. The cubic root of 242858 is about 62.3903571008.

It can be divided in two parts, 24 and 2858, that added together give a palindrome (2882).

The spelling of 242858 in words is "two hundred forty-two thousand, eight hundred fifty-eight".