7917625 has 16 divisors (see below), whose sum is σ = 9998352. Its totient is φ = 6259200.

The previous prime is 7917607. The next prime is 7917647. The reversal of 7917625 is 5267197.

It can be written as a sum of positive squares in 8 ways, for example, as 3853369 + 4064256 = 1963^2 + 2016^2 .

It is not a de Polignac number, because 7917625 - 2⁹ = 7917113 is a prime.

It is a Duffinian number.

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 in 15 ways as a sum of consecutive naturals, for example, 11799 + ... + 12451.

It is an arithmetic number, because the mean of its divisors is an integer number (624897).

Almost surely, 2^7917625 is an apocalyptic number.

It is an amenable number.

7917625 is a deficient number, since it is larger than the sum of its proper divisors (2080727).

7917625 is an equidigital number, since it uses as much as digits as its factorization.

7917625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765 (or 755 counting only the distinct ones).

The product of its digits is 26460, while the sum is 37.

The square root of 7917625 is about 2813.8274645045. The cubic root of 7917625 is about 199.3111719700.

The spelling of 7917625 in words is "seven million, nine hundred seventeen thousand, six hundred twenty-five".