725820 has 24 divisors (see below), whose sum is σ = 2032464. Its totient is φ = 193536.

The previous prime is 725807. The next prime is 725827. The reversal of 725820 is 28527.

725820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 725820.

It is not an unprimeable number, because it can be changed into a prime (725827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5989 + ... + 6108.

It is an arithmetic number, because the mean of its divisors is an integer number (84686).

2⁷²⁵⁸²⁰ is an apocalyptic number.

It is an amenable number.

725820 is an abundant number, since it is smaller than the sum of its proper divisors (1306644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

725820 is a wasteful number, since it uses less digits than its factorization.

725820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12109 (or 12107 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 725820 is about 851.9507027992. The cubic root of 725820 is about 89.8689450573.

The spelling of 725820 in words is "seven hundred twenty-five thousand, eight hundred twenty".