725589 has 6 divisors (see below), whose sum is σ = 1048086. Its totient is φ = 483720.

The previous prime is 725587. The next prime is 725597. The reversal of 725589 is 985527.

725589 is a `hidden beast` number, since 72 + 5 + 589 = 666.

It can be written as a sum of positive squares in only one way, i.e., 400689 + 324900 = 633^2 + 570^2 .

It is not a de Polignac number, because 725589 - 2¹ = 725587 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725587) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40302 + ... + 40319.

It is an arithmetic number, because the mean of its divisors is an integer number (174681).

2⁷²⁵⁵⁸⁹ is an apocalyptic number.

It is an amenable number.

725589 is a deficient number, since it is larger than the sum of its proper divisors (322497).

725589 is a wasteful number, since it uses less digits than its factorization.

725589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80627 (or 80624 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 725589 is about 851.8151207862. The cubic root of 725589 is about 89.8594101272.

The spelling of 725589 in words is "seven hundred twenty-five thousand, five hundred eighty-nine".