8115172 has 12 divisors (see below), whose sum is σ = 15294076. Its totient is φ = 3745440.

The previous prime is 8115169. The next prime is 8115179. The reversal of 8115172 is 2715118.

It can be written as a sum of positive squares in 2 ways, for example, as 5503716 + 2611456 = 2346^2 + 1616^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8115179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77979 + ... + 78082.

Almost surely, 2^8115172 is an apocalyptic number.

It is an amenable number.

8115172 is a deficient number, since it is larger than the sum of its proper divisors (7178904).

8115172 is a wasteful number, since it uses less digits than its factorization.

8115172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156078 (or 156076 counting only the distinct ones).

The product of its digits is 560, while the sum is 25.

The square root of 8115172 is about 2848.7140958685. The cubic root of 8115172 is about 200.9551973937.

The spelling of 8115172 in words is "eight million, one hundred fifteen thousand, one hundred seventy-two".