42179139 has 6 divisors (see below), whose sum is σ = 60925436. Its totient is φ = 28119420.

The previous prime is 42179129. The next prime is 42179153. The reversal of 42179139 is 93197124.

It is not a de Polignac number, because 42179139 - 2²⁴ = 25401923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42179129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2343277 + ... + 2343294.

Almost surely, 2^42179139 is an apocalyptic number.

42179139 is a deficient number, since it is larger than the sum of its proper divisors (18746297).

42179139 is a wasteful number, since it uses less digits than its factorization.

42179139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4686577 (or 4686574 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 42179139 is about 6494.5468664103. The cubic root of 42179139 is about 348.0961634760.

The spelling of 42179139 in words is "forty-two million, one hundred seventy-nine thousand, one hundred thirty-nine".