15125728 has 48 divisors (see below), whose sum is σ = 31026240. Its totient is φ = 7254016.

The previous prime is 15125717. The next prime is 15125731. The reversal of 15125728 is 82752151.

15125728 = T₂₄₇ + T₂₄₈ + ... + T₄₇₂.

15125728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 15125728.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133800 + ... + 133912.

It is an arithmetic number, because the mean of its divisors is an integer number (646380).

Almost surely, 2^15125728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15125728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15513120).

15125728 is an abundant number, since it is smaller than the sum of its proper divisors (15900512).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15125728 is a wasteful number, since it uses less digits than its factorization.

15125728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259 (or 251 counting only the distinct ones).

The product of its digits is 5600, while the sum is 31.

The square root of 15125728 is about 3889.1808906247. The cubic root of 15125728 is about 247.3083398692.

Adding to 15125728 its reverse (82752151), we get a palindrome (97877879).

The spelling of 15125728 in words is "fifteen million, one hundred twenty-five thousand, seven hundred twenty-eight".