15345725 has 6 divisors (see below), whose sum is σ = 19028730. Its totient is φ = 12276560.

The previous prime is 15345721. The next prime is 15345731. The reversal of 15345725 is 52754351.

15345725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 151321 + 15194404 = 389^2 + 3898^2 .

It is not a de Polignac number, because 15345725 - 2² = 15345721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15345691 and 15345700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15345721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 306890 + ... + 306939.

It is an arithmetic number, because the mean of its divisors is an integer number (3171455).

Almost surely, 2^15345725 is an apocalyptic number.

It is an amenable number.

15345725 is a deficient number, since it is larger than the sum of its proper divisors (3683005).

15345725 is an equidigital number, since it uses as much as digits as its factorization.

15345725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613839 (or 613834 counting only the distinct ones).

The product of its digits is 21000, while the sum is 32.

The square root of 15345725 is about 3917.3619950165. The cubic root of 15345725 is about 248.5015701083.

The spelling of 15345725 in words is "fifteen million, three hundred forty-five thousand, seven hundred twenty-five".