15788125 has 10 divisors (see below), whose sum is σ = 19729622. Its totient is φ = 12630000.

The previous prime is 15788111. The next prime is 15788131. The reversal of 15788125 is 52188751.

It can be written as a sum of positive squares in 5 ways, for example, as 9467929 + 6320196 = 3077^2 + 2514^2 .

It is not a de Polignac number, because 15788125 - 2⁷ = 15787997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 12006 + ... + 13255.

Almost surely, 2^15788125 is an apocalyptic number.

It is an amenable number.

15788125 is a deficient number, since it is larger than the sum of its proper divisors (3941497).

15788125 is an frugal number, since it uses more digits than its factorization.

15788125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25281 (or 25266 counting only the distinct ones).

The product of its digits is 22400, while the sum is 37.

The square root of 15788125 is about 3973.4273618628. The cubic root of 15788125 is about 250.8669898388.

It can be divided in two parts, 15 and 788125, that added together give a triangular number (788140 = T₁₂₅₅).

The spelling of 15788125 in words is "fifteen million, seven hundred eighty-eight thousand, one hundred twenty-five".