725616 has 30 divisors (see below), whose sum is σ = 2031120. Its totient is φ = 241824.

The previous prime is 725603. The next prime is 725639. The reversal of 725616 is 616527.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 725616.

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 725616.

It is an unprimeable number.

725616 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2376 + ... + 2663.

It is an arithmetic number, because the mean of its divisors is an integer number (67704).

2⁷²⁵⁶¹⁶ is an apocalyptic number.

It is an amenable number.

725616 is an abundant number, since it is smaller than the sum of its proper divisors (1305504).

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

725616 is a wasteful number, since it uses less digits than its factorization.

725616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5053 (or 5044 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 725616 is about 851.8309691482. The cubic root of 725616 is about 89.8605247040.

The spelling of 725616 in words is "seven hundred twenty-five thousand, six hundred sixteen".