15328125 has 42 divisors (see below), whose sum is σ = 27929330. Its totient is φ = 8100000.

The previous prime is 15328121. The next prime is 15328127. The reversal of 15328125 is 52182351.

It is a happy number.

15328125 is a `hidden beast` number, since 1 + 532 + 8 + 125 = 666.

It can be written as a sum of positive squares in 7 ways, for example, as 15256836 + 71289 = 3906^2 + 267^2 .

It is not a de Polignac number, because 15328125 - 2² = 15328121 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15328121) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 140571 + ... + 140679.

Almost surely, 2^15328125 is an apocalyptic number.

15328125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15328125 is a deficient number, since it is larger than the sum of its proper divisors (12601205).

15328125 is an frugal number, since it uses more digits than its factorization.

15328125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 117 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 15328125 is about 3915.1149408415. The cubic root of 15328125 is about 248.4065316804.

The spelling of 15328125 in words is "fifteen million, three hundred twenty-eight thousand, one hundred twenty-five".