39921142 has 8 divisors (see below), whose sum is σ = 61155936. Its totient is φ = 19535832.

The previous prime is 39921131. The next prime is 39921163. The reversal of 39921142 is 24112993.

39921142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212253 + ... + 212440.

It is an arithmetic number, because the mean of its divisors is an integer number (7644492).

Almost surely, 2^39921142 is an apocalyptic number.

39921142 is a deficient number, since it is larger than the sum of its proper divisors (21234794).

39921142 is a wasteful number, since it uses less digits than its factorization.

39921142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424742.

The product of its digits is 3888, while the sum is 31.

The square root of 39921142 is about 6318.3179723721. The cubic root of 39921142 is about 341.7702993454.

The spelling of 39921142 in words is "thirty-nine million, nine hundred twenty-one thousand, one hundred forty-two".