7718125 has 20 divisors (see below), whose sum is σ = 9868716. Its totient is φ = 6032000.

The previous prime is 7718111. The next prime is 7718129. The reversal of 7718125 is 5218177.

It is a happy number.

It can be written as a sum of positive squares in 10 ways, for example, as 6215049 + 1503076 = 2493^2 + 1226^2 .

It is not a de Polignac number, because 7718125 - 2⁵ = 7718093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7718129) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 33009 + ... + 33241.

Almost surely, 2^7718125 is an apocalyptic number.

It is an amenable number.

7718125 is a deficient number, since it is larger than the sum of its proper divisors (2150591).

7718125 is an equidigital number, since it uses as much as digits as its factorization.

7718125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 291 counting only the distinct ones).

The product of its digits is 3920, while the sum is 31.

The square root of 7718125 is about 2778.1513637669. The cubic root of 7718125 is about 197.6229005924.

The spelling of 7718125 in words is "seven million, seven hundred eighteen thousand, one hundred twenty-five".