42658939 has 4 divisors (see below), whose sum is σ = 43566624. Its totient is φ = 41751256.

The previous prime is 42658921. The next prime is 42658963. The reversal of 42658939 is 93985624.

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 42658939 - 2²⁵ = 9104507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42658909) 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, 453772 + ... + 453865.

It is an arithmetic number, because the mean of its divisors is an integer number (10891656).

Almost surely, 2^42658939 is an apocalyptic number.

42658939 is a deficient number, since it is larger than the sum of its proper divisors (907685).

42658939 is an equidigital number, since it uses as much as digits as its factorization.

42658939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907684.

The product of its digits is 466560, while the sum is 46.

The square root of 42658939 is about 6531.3810943781. The cubic root of 42658939 is about 349.4110885625.

The spelling of 42658939 in words is "forty-two million, six hundred fifty-eight thousand, nine hundred thirty-nine".