7725825 has 18 divisors (see below), whose sum is σ = 13838214. Its totient is φ = 4120320.

The previous prime is 7725821. The next prime is 7725857. The reversal of 7725825 is 5285277.

7725825 is a `hidden beast` number, since 7 + 72 + 582 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 370881 + 7354944 = 609^2 + 2712^2 .

It is not a de Polignac number, because 7725825 - 2² = 7725821 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7725825.

It is not an unprimeable number, because it can be changed into a prime (7725821) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 16944 + ... + 17393.

Almost surely, 2^7725825 is an apocalyptic number.

7725825 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

7725825 is a deficient number, since it is larger than the sum of its proper divisors (6112389).

7725825 is a wasteful number, since it uses less digits than its factorization.

7725825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34353 (or 34345 counting only the distinct ones).

The product of its digits is 39200, while the sum is 36.

The square root of 7725825 is about 2779.5368319200. The cubic root of 7725825 is about 197.6885983525.

The spelling of 7725825 in words is "seven million, seven hundred twenty-five thousand, eight hundred twenty-five".