725751 has 12 divisors (see below), whose sum is σ = 1129128. Its totient is φ = 446544.

The previous prime is 725749. The next prime is 725789. The reversal of 725751 is 157527.

It is not a de Polignac number, because 725751 - 2¹ = 725749 is a prime.

725751 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725731) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2985 + ... + 3218.

It is an arithmetic number, because the mean of its divisors is an integer number (94094).

2⁷²⁵⁷⁵¹ is an apocalyptic number.

725751 is a deficient number, since it is larger than the sum of its proper divisors (403377).

725751 is a wasteful number, since it uses less digits than its factorization.

725751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6222 (or 6219 counting only the distinct ones).

The product of its digits is 2450, while the sum is 27.

The square root of 725751 is about 851.9102065359. The cubic root of 725751 is about 89.8660971732.

The spelling of 725751 in words is "seven hundred twenty-five thousand, seven hundred fifty-one".