6915625 has 12 divisors (see below), whose sum is σ = 8647884. Its totient is φ = 5530000.

The previous prime is 6915619. The next prime is 6915661. The reversal of 6915625 is 5265196.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 3489424 + 3426201 = 1868^2 + 1851^2 .

It is not a de Polignac number, because 6915625 - 2⁷ = 6915497 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2019 + ... + 4231.

It is an arithmetic number, because the mean of its divisors is an integer number (720657).

Almost surely, 2^6915625 is an apocalyptic number.

It is an amenable number.

6915625 is a deficient number, since it is larger than the sum of its proper divisors (1732259).

6915625 is an frugal number, since it uses more digits than its factorization.

6915625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2238 (or 2218 counting only the distinct ones).

The product of its digits is 16200, while the sum is 34.

The square root of 6915625 is about 2629.7575933915. The cubic root of 6915625 is about 190.5214209304.

The spelling of 6915625 in words is "six million, nine hundred fifteen thousand, six hundred twenty-five".