725870 has 16 divisors (see below), whose sum is σ = 1352160. Its totient is φ = 280224.

The previous prime is 725867. The next prime is 725891. The reversal of 725870 is 78527.

It is a Harshad number since it is a multiple of its sum of digits (29).

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

It is a Curzon number.

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 725870.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 962 + ... + 1541.

It is an arithmetic number, because the mean of its divisors is an integer number (84510).

2⁷²⁵⁸⁷⁰ is an apocalyptic number.

725870 is a deficient number, since it is larger than the sum of its proper divisors (626290).

725870 is a wasteful number, since it uses less digits than its factorization.

725870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2539.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 725870 is about 851.9800467147. The cubic root of 725870 is about 89.8710086287.

The spelling of 725870 in words is "seven hundred twenty-five thousand, eight hundred seventy".