725831 has 4 divisors (see below), whose sum is σ = 732600. Its totient is φ = 719064.

The previous prime is 725827. The next prime is 725861. The reversal of 725831 is 138527.

725831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 138527 = 83 ⋅1669.

It is a cyclic number.

It is not a de Polignac number, because 725831 - 2² = 725827 is a prime.

It is a super-2 number, since 2×725831² = 1053661281122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 725831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725801) 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, 3221 + ... + 3438.

It is an arithmetic number, because the mean of its divisors is an integer number (183150).

2⁷²⁵⁸³¹ is an apocalyptic number.

725831 is a deficient number, since it is larger than the sum of its proper divisors (6769).

725831 is a wasteful number, since it uses less digits than its factorization.

725831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6768.

The product of its digits is 1680, while the sum is 26.

The square root of 725831 is about 851.9571585473. The cubic root of 725831 is about 89.8693990512.

The spelling of 725831 in words is "seven hundred twenty-five thousand, eight hundred thirty-one".