8505172 has 12 divisors (see below), whose sum is σ = 16029076. Its totient is φ = 3925440.

The previous prime is 8505137. The next prime is 8505187. The reversal of 8505172 is 2715058.

It can be written as a sum of positive squares in 2 ways, for example, as 1354896 + 7150276 = 1164^2 + 2674^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 8505172.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81729 + ... + 81832.

Almost surely, 2^8505172 is an apocalyptic number.

It is an amenable number.

8505172 is a deficient number, since it is larger than the sum of its proper divisors (7523904).

8505172 is a wasteful number, since it uses less digits than its factorization.

8505172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163578 (or 163576 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 8505172 is about 2916.3628032191. The cubic root of 8505172 is about 204.1241394880.

The spelling of 8505172 in words is "eight million, five hundred five thousand, one hundred seventy-two".