9072172 has 6 divisors (see below), whose sum is σ = 15876308. Its totient is φ = 4536084.

The previous prime is 9072127. The next prime is 9072191. The reversal of 9072172 is 2712709.

It is a happy number.

9072172 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 9072172.

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, 1134018 + ... + 1134025.

Almost surely, 2^9072172 is an apocalyptic number.

It is an amenable number.

9072172 is a deficient number, since it is larger than the sum of its proper divisors (6804136).

9072172 is a wasteful number, since it uses less digits than its factorization.

9072172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2268047 (or 2268045 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 9072172 is about 3012.0046480708. The cubic root of 9072172 is about 208.5629167549.

Subtracting from 9072172 its sum of digits (28), we obtain a square (9072144 = 3012²).

The spelling of 9072172 in words is "nine million, seventy-two thousand, one hundred seventy-two".