39142172 has 6 divisors (see below), whose sum is σ = 68498808. Its totient is φ = 19571084.

The previous prime is 39142171. The next prime is 39142241. The reversal of 39142172 is 27124193.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39142171) 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 as a sum of consecutive naturals, namely, 4892768 + ... + 4892775.

It is an arithmetic number, because the mean of its divisors is an integer number (11416468).

Almost surely, 2^39142172 is an apocalyptic number.

It is an amenable number.

39142172 is a deficient number, since it is larger than the sum of its proper divisors (29356636).

39142172 is a wasteful number, since it uses less digits than its factorization.

39142172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9785547 (or 9785545 counting only the distinct ones).

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

The square root of 39142172 is about 6256.3705133248. The cubic root of 39142172 is about 339.5327260386.

The spelling of 39142172 in words is "thirty-nine million, one hundred forty-two thousand, one hundred seventy-two".