7921172 has 24 divisors (see below), whose sum is σ = 16047360. Its totient is φ = 3350880.

The previous prime is 7921171. The next prime is 7921189. The reversal of 7921172 is 2711297.

7921172 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

7921172 is strictly pandigital in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7921171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 422 + ... + 4002.

It is an arithmetic number, because the mean of its divisors is an integer number (668640).

Almost surely, 2^7921172 is an apocalyptic number.

It is an amenable number.

7921172 is an abundant number, since it is smaller than the sum of its proper divisors (8126188).

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

7921172 is a wasteful number, since it uses less digits than its factorization.

7921172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3671 (or 3669 counting only the distinct ones).

The product of its digits is 1764, while the sum is 29.

The square root of 7921172 is about 2814.4576742243. The cubic root of 7921172 is about 199.3409305228.

The spelling of 7921172 in words is "seven million, nine hundred twenty-one thousand, one hundred seventy-two".