242367857 has 4 divisors (see below), whose sum is σ = 255124080. Its totient is φ = 229611636.

The previous prime is 242367821. The next prime is 242367899. The reversal of 242367857 is 758763242.

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 a cyclic number.

It is not a de Polignac number, because 242367857 - 2²⁴ = 225590641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242367817) 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, 6378083 + ... + 6378120.

It is an arithmetic number, because the mean of its divisors is an integer number (63781020).

Almost surely, 2^242367857 is an apocalyptic number.

It is an amenable number.

242367857 is a deficient number, since it is larger than the sum of its proper divisors (12756223).

242367857 is a wasteful number, since it uses less digits than its factorization.

242367857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12756222.

The product of its digits is 564480, while the sum is 44.

The square root of 242367857 is about 15568.1680682089. The cubic root of 242367857 is about 623.4835616124.

The spelling of 242367857 in words is "two hundred forty-two million, three hundred sixty-seven thousand, eight hundred fifty-seven".