240442957 has 2 divisors, whose sum is σ = 240442958. Its totient is φ = 240442956.

The previous prime is 240442933. The next prime is 240442999. The reversal of 240442957 is 759244042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217680516 + 22762441 = 14754^2 + 4771^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240442957 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240442057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120221478 + 120221479.

It is an arithmetic number, because the mean of its divisors is an integer number (120221479).

Almost surely, 2^240442957 is an apocalyptic number.

It is an amenable number.

240442957 is a deficient number, since it is larger than the sum of its proper divisors (1).

240442957 is an equidigital number, since it uses as much as digits as its factorization.

240442957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 240442957 is about 15506.2231700695. The cubic root of 240442957 is about 621.8285913264.

Adding to 240442957 its reverse (759244042), we get a palindrome (999686999).

The spelling of 240442957 in words is "two hundred forty million, four hundred forty-two thousand, nine hundred fifty-seven".