725911 has 4 divisors (see below), whose sum is σ = 727632. Its totient is φ = 724192.

The previous prime is 725909. The next prime is 725929. The reversal of 725911 is 119527.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 725911 - 2¹ = 725909 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 (725981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255 + ... + 1231.

It is an arithmetic number, because the mean of its divisors is an integer number (181908).

2⁷²⁵⁹¹¹ is an apocalyptic number.

725911 is a deficient number, since it is larger than the sum of its proper divisors (1721).

725911 is an equidigital number, since it uses as much as digits as its factorization.

725911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1720.

The product of its digits is 630, while the sum is 25.

The square root of 725911 is about 852.0041079713. The cubic root of 725911 is about 89.8727006865.

The spelling of 725911 in words is "seven hundred twenty-five thousand, nine hundred eleven".