242856 has 24 divisors (see below), whose sum is σ = 657930. Its totient is φ = 80928.

The previous prime is 242819. The next prime is 242863. The reversal of 242856 is 658242.

242856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 133956 + 108900 = 366^2 + 330^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a nialpdrome in base 12.

It is an unprimeable number.

242856 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 5 ways as a sum of consecutive naturals, for example, 1615 + ... + 1758.

2²⁴²⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

242856 is an abundant number, since it is smaller than the sum of its proper divisors (415074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

242856 is a wasteful number, since it uses less digits than its factorization.

242856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3385 (or 3378 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 242856 is about 492.8042207611. The cubic root of 242856 is about 62.3901858333.

The spelling of 242856 in words is "two hundred forty-two thousand, eight hundred fifty-six".