42339187 has 4 divisors (see below), whose sum is σ = 46188216. Its totient is φ = 38490160.

The previous prime is 42339139. The next prime is 42339191. The reversal of 42339187 is 78193324.

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-42339187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42339107) 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, 1924498 + ... + 1924519.

It is an arithmetic number, because the mean of its divisors is an integer number (11547054).

Almost surely, 2^42339187 is an apocalyptic number.

42339187 is a deficient number, since it is larger than the sum of its proper divisors (3849029).

42339187 is a wasteful number, since it uses less digits than its factorization.

42339187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3849028.

The product of its digits is 36288, while the sum is 37.

The square root of 42339187 is about 6506.8569217403. The cubic root of 42339187 is about 348.5358893538.

The spelling of 42339187 in words is "forty-two million, three hundred thirty-nine thousand, one hundred eighty-seven".