42586139 has 4 divisors (see below), whose sum is σ = 45091224. Its totient is φ = 40081056.

The previous prime is 42586127. The next prime is 42586147. The reversal of 42586139 is 93168524.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42586139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42586939) 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 3 ways as a sum of consecutive naturals, for example, 1252517 + ... + 1252550.

It is an arithmetic number, because the mean of its divisors is an integer number (11272806).

Almost surely, 2^42586139 is an apocalyptic number.

42586139 is a deficient number, since it is larger than the sum of its proper divisors (2505085).

42586139 is a wasteful number, since it uses less digits than its factorization.

42586139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2505084.

The product of its digits is 51840, while the sum is 38.

The square root of 42586139 is about 6525.8056207644. The cubic root of 42586139 is about 349.2122118318.

The spelling of 42586139 in words is "forty-two million, five hundred eighty-six thousand, one hundred thirty-nine".