725865 has 32 divisors (see below), whose sum is σ = 1376256. Its totient is φ = 319680.

The previous prime is 725863. The next prime is 725867. The reversal of 725865 is 568527.

It is a happy number.

725865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (725863) and next prime (725867).

It is not a de Polignac number, because 725865 - 2¹ = 725863 is a prime.

725865 is a lucky number.

It is a nialpdrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 725865.

It is not an unprimeable number, because it can be changed into a prime (725861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3144 + ... + 3366.

It is an arithmetic number, because the mean of its divisors is an integer number (43008).

2⁷²⁵⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

725865 is a deficient number, since it is larger than the sum of its proper divisors (650391).

725865 is a wasteful number, since it uses less digits than its factorization.

725865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269.

The product of its digits is 16800, while the sum is 33.

The square root of 725865 is about 851.9771123686. The cubic root of 725865 is about 89.8708022758.

The spelling of 725865 in words is "seven hundred twenty-five thousand, eight hundred sixty-five".