39172142 has 4 divisors (see below), whose sum is σ = 58758216. Its totient is φ = 19586070.

The previous prime is 39172123. The next prime is 39172163. The reversal of 39172142 is 24127193.

39172142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24127193 = 433 ⋅55721.

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 as a sum of consecutive naturals, namely, 9793034 + ... + 9793037.

It is an arithmetic number, because the mean of its divisors is an integer number (14689554).

Almost surely, 2^39172142 is an apocalyptic number.

39172142 is a deficient number, since it is larger than the sum of its proper divisors (19586074).

39172142 is a wasteful number, since it uses less digits than its factorization.

39172142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19586073.

The product of its digits is 3024, while the sum is 29.

The square root of 39172142 is about 6258.7652136823. The cubic root of 39172142 is about 339.6193606433.

The spelling of 39172142 in words is "thirty-nine million, one hundred seventy-two thousand, one hundred forty-two".