42039934 has 4 divisors (see below), whose sum is σ = 63059904. Its totient is φ = 21019966.

The previous prime is 42039931. The next prime is 42039947. The reversal of 42039934 is 43993024.

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

It is a self number, because there is not a number n which added to its sum of digits gives 42039934.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42039931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10509982 + ... + 10509985.

It is an arithmetic number, because the mean of its divisors is an integer number (15764976).

Almost surely, 2^42039934 is an apocalyptic number.

42039934 is a deficient number, since it is larger than the sum of its proper divisors (21019970).

42039934 is a wasteful number, since it uses less digits than its factorization.

42039934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21019969.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 42039934 is about 6483.8209413894. The cubic root of 42039934 is about 347.7127975655.

The spelling of 42039934 in words is "forty-two million, thirty-nine thousand, nine hundred thirty-four".