8139172 has 6 divisors (see below), whose sum is σ = 14243558. Its totient is φ = 4069584.

The previous prime is 8139151. The next prime is 8139203. The reversal of 8139172 is 2719318.

It can be written as a sum of positive squares in only one way, i.e., 6937956 + 1201216 = 2634^2 + 1096^2 .

It is a super-2 number, since 2×8139172² = 132492241691168, which contains 22 as substring.

It is an unprimeable number.

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, 1017393 + ... + 1017400.

Almost surely, 2^8139172 is an apocalyptic number.

It is an amenable number.

8139172 is a deficient number, since it is larger than the sum of its proper divisors (6104386).

8139172 is a wasteful number, since it uses less digits than its factorization.

8139172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034797 (or 2034795 counting only the distinct ones).

The product of its digits is 3024, while the sum is 31.

The square root of 8139172 is about 2852.9234129223. The cubic root of 8139172 is about 201.1531056268.

The spelling of 8139172 in words is "eight million, one hundred thirty-nine thousand, one hundred seventy-two".