725771 has 4 divisors (see below), whose sum is σ = 727632. Its totient is φ = 723912.

The previous prime is 725749. The next prime is 725789. The reversal of 725771 is 177527.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 725771 - 2¹⁰ = 724747 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 95 + ... + 1208.

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

2⁷²⁵⁷⁷¹ is an apocalyptic number.

725771 is a deficient number, since it is larger than the sum of its proper divisors (1861).

725771 is a wasteful number, since it uses less digits than its factorization.

725771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860.

The product of its digits is 3430, while the sum is 29.

The square root of 725771 is about 851.9219447813. The cubic root of 725771 is about 89.8669226655.

The spelling of 725771 in words is "seven hundred twenty-five thousand, seven hundred seventy-one".