42431057 has 2 divisors, whose sum is σ = 42431058. Its totient is φ = 42431056.

The previous prime is 42431041. The next prime is 42431063. The reversal of 42431057 is 75013424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41357761 + 1073296 = 6431^2 + 1036^2 .

It is a cyclic number.

It is not a de Polignac number, because 42431057 - 2⁴ = 42431041 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42431087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21215528 + 21215529.

It is an arithmetic number, because the mean of its divisors is an integer number (21215529).

Almost surely, 2^42431057 is an apocalyptic number.

It is an amenable number.

42431057 is a deficient number, since it is larger than the sum of its proper divisors (1).

42431057 is an equidigital number, since it uses as much as digits as its factorization.

42431057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 42431057 is about 6513.9125723332. The cubic root of 42431057 is about 348.7877983038.

The spelling of 42431057 in words is "forty-two million, four hundred thirty-one thousand, fifty-seven".