42540339 has 16 divisors (see below), whose sum is σ = 59131904. Its totient is φ = 27172800.

The previous prime is 42540331. The next prime is 42540349. The reversal of 42540339 is 93304524.

It is not a de Polignac number, because 42540339 - 2³ = 42540331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42540331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7359 + ... + 11799.

It is an arithmetic number, because the mean of its divisors is an integer number (3695744).

Almost surely, 2^42540339 is an apocalyptic number.

42540339 is a deficient number, since it is larger than the sum of its proper divisors (16591565).

42540339 is a wasteful number, since it uses less digits than its factorization.

42540339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4578.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 42540339 is about 6522.2955314828. The cubic root of 42540339 is about 349.0869781545.

The spelling of 42540339 in words is "forty-two million, five hundred forty thousand, three hundred thirty-nine".