15117172 has 12 divisors (see below), whose sum is σ = 30234400. Its totient is φ = 6478776.

The previous prime is 15117169. The next prime is 15117197. The reversal of 15117172 is 27171151.

15117172 is an admirable number.

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, 269922 + ... + 269977.

Almost surely, 2^15117172 is an apocalyptic number.

It is an amenable number.

15117172 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15117172 is a wasteful number, since it uses less digits than its factorization.

15117172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539910 (or 539908 counting only the distinct ones).

The product of its digits is 490, while the sum is 25.

The square root of 15117172 is about 3888.0807604781. The cubic root of 15117172 is about 247.2617003674.

The spelling of 15117172 in words is "fifteen million, one hundred seventeen thousand, one hundred seventy-two".