42340057 has 6 divisors (see below), whose sum is σ = 43156862. Its totient is φ = 41538432.

The previous prime is 42340049. The next prime is 42340093. The reversal of 42340057 is 75004324.

It can be written as a sum of positive squares in 3 ways, for example, as 13995081 + 28344976 = 3741^2 + 5324^2 .

It is not a de Polignac number, because 42340057 - 2³ = 42340049 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42340027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4728 + ... + 10345.

Almost surely, 2^42340057 is an apocalyptic number.

It is an amenable number.

42340057 is a deficient number, since it is larger than the sum of its proper divisors (816805).

42340057 is an equidigital number, since it uses as much as digits as its factorization.

42340057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15179 (or 15126 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 42340057 is about 6506.9237739503. The cubic root of 42340057 is about 348.5382766154.

The spelling of 42340057 in words is "forty-two million, three hundred forty thousand, fifty-seven".