15125625 has 30 divisors (see below), whose sum is σ = 27311570. Its totient is φ = 8064000.

The previous prime is 15125623. The next prime is 15125647. The reversal of 15125625 is 52652151.

15125625 is a `hidden beast` number, since 15 + 1 + 25 + 625 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 10342656 + 4782969 = 3216^2 + 2187^2 .

It is not a de Polignac number, because 15125625 - 2¹ = 15125623 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15125623) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 4281 + ... + 6969.

Almost surely, 2^15125625 is an apocalyptic number.

15125625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15125625 is a deficient number, since it is larger than the sum of its proper divisors (12185945).

15125625 is an equidigital number, since it uses as much as digits as its factorization.

15125625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2715 (or 2697 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 15125625 is about 3889.1676487393. The cubic root of 15125625 is about 247.3077785118.

Adding to 15125625 its reverse (52652151), we get a palindrome (67777776).

The spelling of 15125625 in words is "fifteen million, one hundred twenty-five thousand, six hundred twenty-five".