725528 has 16 divisors (see below), whose sum is σ = 1377000. Its totient is φ = 358336.

The previous prime is 725519. The next prime is 725531. The reversal of 725528 is 825527.

It is a self number, because there is not a number n which added to its sum of digits gives 725528.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 725528.

It is an unprimeable number.

725528 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203 + ... + 1221.

2⁷²⁵⁵²⁸ is an apocalyptic number.

It is an amenable number.

725528 is a deficient number, since it is larger than the sum of its proper divisors (651472).

725528 is a wasteful number, since it uses less digits than its factorization.

725528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114 (or 1110 counting only the distinct ones).

The product of its digits is 5600, while the sum is 29.

The square root of 725528 is about 851.7793141419. The cubic root of 725528 is about 89.8568919074.

Subtracting 725528 from its reverse (825527), we obtain a palindrome (99999).

The spelling of 725528 in words is "seven hundred twenty-five thousand, five hundred twenty-eight".