725813 has 4 divisors (see below), whose sum is σ = 791808. Its totient is φ = 659820.

The previous prime is 725807. The next prime is 725827. The reversal of 725813 is 318527.

725813 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 725813 - 2⁶ = 725749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725863) 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, 32981 + ... + 33002.

It is an arithmetic number, because the mean of its divisors is an integer number (197952).

2⁷²⁵⁸¹³ is an apocalyptic number.

It is an amenable number.

725813 is a deficient number, since it is larger than the sum of its proper divisors (65995).

725813 is a wasteful number, since it uses less digits than its factorization.

725813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65994.

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

The square root of 725813 is about 851.9465945703. The cubic root of 725813 is about 89.8686561498.

It can be divided in two parts, 72 and 5813, that added together give a palindrome (5885).

The spelling of 725813 in words is "seven hundred twenty-five thousand, eight hundred thirteen".