42017139 has 6 divisors (see below), whose sum is σ = 60691436. Its totient is φ = 28011420.

The previous prime is 42017137. The next prime is 42017141. The reversal of 42017139 is 93171024.

It is an interprime number because it is at equal distance from previous prime (42017137) and next prime (42017141).

It is not a de Polignac number, because 42017139 - 2¹ = 42017137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42017137) 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, 2334277 + ... + 2334294.

Almost surely, 2^42017139 is an apocalyptic number.

42017139 is a deficient number, since it is larger than the sum of its proper divisors (18674297).

42017139 is a wasteful number, since it uses less digits than its factorization.

42017139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4668577 (or 4668574 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 42017139 is about 6482.0628660944. The cubic root of 42017139 is about 347.6499402972.

The spelling of 42017139 in words is "forty-two million, seventeen thousand, one hundred thirty-nine".