242502857 has 2 divisors, whose sum is σ = 242502858. Its totient is φ = 242502856.

The previous prime is 242502809. The next prime is 242502889. The reversal of 242502857 is 758205242.

242502857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225330121 + 17172736 = 15011^2 + 4144^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242502857 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (242502257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121251428 + 121251429.

It is an arithmetic number, because the mean of its divisors is an integer number (121251429).

Almost surely, 2^242502857 is an apocalyptic number.

It is an amenable number.

242502857 is a deficient number, since it is larger than the sum of its proper divisors (1).

242502857 is an equidigital number, since it uses as much as digits as its factorization.

242502857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44800, while the sum is 35.

The square root of 242502857 is about 15572.5032348688. The cubic root of 242502857 is about 623.5993011869.

The spelling of 242502857 in words is "two hundred forty-two million, five hundred two thousand, eight hundred fifty-seven".