725889 has 4 divisors (see below), whose sum is σ = 967856. Its totient is φ = 483924.

The previous prime is 725867. The next prime is 725891. The reversal of 725889 is 988527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 725889 - 2¹² = 721793 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (725189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120979 + ... + 120984.

It is an arithmetic number, because the mean of its divisors is an integer number (241964).

2⁷²⁵⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

725889 is a deficient number, since it is larger than the sum of its proper divisors (241967).

725889 is a wasteful number, since it uses less digits than its factorization.

725889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241966.

The product of its digits is 40320, while the sum is 39.

The square root of 725889 is about 851.9911971376. The cubic root of 725889 is about 89.8717927610.

The spelling of 725889 in words is "seven hundred twenty-five thousand, eight hundred eighty-nine".