15564725 has 12 divisors (see below), whose sum is σ = 21055200. Its totient is φ = 11319600.

The previous prime is 15564719. The next prime is 15564727. The reversal of 15564725 is 52746551.

It is not a de Polignac number, because 15564725 - 2²⁰ = 14516149 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 (15564727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28025 + ... + 28574.

It is an arithmetic number, because the mean of its divisors is an integer number (1754600).

Almost surely, 2^15564725 is an apocalyptic number.

It is an amenable number.

15564725 is a deficient number, since it is larger than the sum of its proper divisors (5490475).

15564725 is a wasteful number, since it uses less digits than its factorization.

15564725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56620 (or 56615 counting only the distinct ones).

The product of its digits is 42000, while the sum is 35.

The square root of 15564725 is about 3945.2154567273. The cubic root of 15564725 is about 249.6781190819.

The spelling of 15564725 in words is "fifteen million, five hundred sixty-four thousand, seven hundred twenty-five".