242764257 has 4 divisors (see below), whose sum is σ = 323685680. Its totient is φ = 161842836.

The previous prime is 242764243. The next prime is 242764303. The reversal of 242764257 is 752467242.

It is a happy number.

242764257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 242764257 - 2⁷ = 242764129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242764217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40460707 + ... + 40460712.

It is an arithmetic number, because the mean of its divisors is an integer number (80921420).

Almost surely, 2^242764257 is an apocalyptic number.

It is an amenable number.

242764257 is a deficient number, since it is larger than the sum of its proper divisors (80921423).

242764257 is an equidigital number, since it uses as much as digits as its factorization.

242764257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80921422.

The product of its digits is 188160, while the sum is 39.

The square root of 242764257 is about 15580.8939730684. The cubic root of 242764257 is about 623.8232852449.

The spelling of 242764257 in words is "two hundred forty-two million, seven hundred sixty-four thousand, two hundred fifty-seven".