242688057 has 12 divisors (see below), whose sum is σ = 334362960. Its totient is φ = 156571080.

The previous prime is 242688053. The next prime is 242688059. The reversal of 242688057 is 750886242.

It is a happy number.

242688057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 242688057 - 2² = 242688053 is a prime.

It is not an unprimeable number, because it can be changed into a prime (242688053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39207 + ... + 44972.

It is an arithmetic number, because the mean of its divisors is an integer number (27863580).

Almost surely, 2^242688057 is an apocalyptic number.

It is an amenable number.

242688057 is a deficient number, since it is larger than the sum of its proper divisors (91674903).

242688057 is an equidigital number, since it uses as much as digits as its factorization.

242688057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84244 (or 84213 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The square root of 242688057 is about 15578.4484785873. The cubic root of 242688057 is about 623.7580088744.

The spelling of 242688057 in words is "two hundred forty-two million, six hundred eighty-eight thousand, fifty-seven".