15984625 has 8 divisors (see below), whose sum is σ = 19948968. Its totient is φ = 12787600.

The previous prime is 15984613. The next prime is 15984649. The reversal of 15984625 is 52648951.

It can be written as a sum of positive squares in 4 ways, for example, as 4397409 + 11587216 = 2097^2 + 3404^2 .

It is not a de Polignac number, because 15984625 - 2⁵ = 15984593 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63814 + ... + 64063.

It is an arithmetic number, because the mean of its divisors is an integer number (2493621).

Almost surely, 2^15984625 is an apocalyptic number.

It is an amenable number.

15984625 is a deficient number, since it is larger than the sum of its proper divisors (3964343).

15984625 is an equidigital number, since it uses as much as digits as its factorization.

15984625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127892 (or 127882 counting only the distinct ones).

The product of its digits is 86400, while the sum is 40.

The square root of 15984625 is about 3998.0776630776. The cubic root of 15984625 is about 251.9034704193.

The spelling of 15984625 in words is "fifteen million, nine hundred eighty-four thousand, six hundred twenty-five".