242564856 has 32 divisors (see below), whose sum is σ = 621205200. Its totient is φ = 78882560.

The previous prime is 242564851. The next prime is 242564867. The reversal of 242564856 is 658465242.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242564851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122271 + ... + 124238.

Almost surely, 2^242564856 is an apocalyptic number.

It is an amenable number.

242564856 is an abundant number, since it is smaller than the sum of its proper divisors (378640344).

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

242564856 is a wasteful number, since it uses less digits than its factorization.

242564856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246559 (or 246555 counting only the distinct ones).

The product of its digits is 460800, while the sum is 42.

The square root of 242564856 is about 15574.4937638435. The cubic root of 242564856 is about 623.6524404079.

The spelling of 242564856 in words is "two hundred forty-two million, five hundred sixty-four thousand, eight hundred fifty-six".