42431957 has 2 divisors, whose sum is σ = 42431958. Its totient is φ = 42431956.

The previous prime is 42431951. The next prime is 42431969. The reversal of 42431957 is 75913424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35832196 + 6599761 = 5986^2 + 2569^2 .

It is a cyclic number.

It is not a de Polignac number, because 42431957 - 2¹⁶ = 42366421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42431951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21215978 + 21215979.

It is an arithmetic number, because the mean of its divisors is an integer number (21215979).

Almost surely, 2^42431957 is an apocalyptic number.

It is an amenable number.

42431957 is a deficient number, since it is larger than the sum of its proper divisors (1).

42431957 is an equidigital number, since it uses as much as digits as its factorization.

42431957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 35.

The square root of 42431957 is about 6513.9816548713. The cubic root of 42431957 is about 348.7902643183.

The spelling of 42431957 in words is "forty-two million, four hundred thirty-one thousand, nine hundred fifty-seven".