42046139 has 4 divisors (see below), whose sum is σ = 43874256. Its totient is φ = 40218024.

The previous prime is 42046111. The next prime is 42046187. The reversal of 42046139 is 93164024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42046139 - 2²⁰ = 40997563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42046189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 914024 + ... + 914069.

It is an arithmetic number, because the mean of its divisors is an integer number (10968564).

Almost surely, 2^42046139 is an apocalyptic number.

42046139 is a deficient number, since it is larger than the sum of its proper divisors (1828117).

42046139 is a wasteful number, since it uses less digits than its factorization.

42046139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1828116.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 42046139 is about 6484.2994224511. The cubic root of 42046139 is about 347.7299039336.

The spelling of 42046139 in words is "forty-two million, forty-six thousand, one hundred thirty-nine".