725231 has 4 divisors (see below), whose sum is σ = 781032. Its totient is φ = 669432.

The previous prime is 725209. The next prime is 725273. The reversal of 725231 is 132527.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-725231 is a prime.

It is a super-2 number, since 2×725231² = 1051920006722, which contains 22 as substring.

It is a Duffinian number.

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 725231.

It is not an unprimeable number, because it can be changed into a prime (725201) 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, 27881 + ... + 27906.

It is an arithmetic number, because the mean of its divisors is an integer number (195258).

2⁷²⁵²³¹ is an apocalyptic number.

725231 is a deficient number, since it is larger than the sum of its proper divisors (55801).

725231 is a wasteful number, since it uses less digits than its factorization.

725231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55800.

The product of its digits is 420, while the sum is 20.

The square root of 725231 is about 851.6049553637. The cubic root of 725231 is about 89.8446290500.

Adding to 725231 its reverse (132527), we get a palindrome (857758).

Subtracting from 725231 its reverse (132527), we obtain a cube (592704 = 84³).

The spelling of 725231 in words is "seven hundred twenty-five thousand, two hundred thirty-one".