42939 has 12 divisors (see below), whose sum is σ = 66976. Its totient is φ = 26352.

The previous prime is 42937. The next prime is 42943. The reversal of 42939 is 93924.

42939 is nontrivially palindromic in base 14.

It is not a de Polignac number, because 42939 - 2¹ = 42937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42937) 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 11 ways as a sum of consecutive naturals, for example, 67 + ... + 300.

2⁴²⁹³⁹ is an apocalyptic number.

42939 is a deficient number, since it is larger than the sum of its proper divisors (24037).

42939 is a wasteful number, since it uses less digits than its factorization.

42939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386 (or 383 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 42939 is about 207.2172772719. The cubic root of 42939 is about 35.0174063080.

The spelling of 42939 in words is "forty-two thousand, nine hundred thirty-nine".