724685 has 8 divisors (see below), whose sum is σ = 936600. Its totient is φ = 535104.

The previous prime is 724651. The next prime is 724721. The reversal of 724685 is 586427.

It can be written as a sum of positive squares in 4 ways, for example, as 484 + 724201 = 22^2 + 851^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 724685 - 2⁶ = 724621 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5510 + ... + 5639.

It is an arithmetic number, because the mean of its divisors is an integer number (117075).

2⁷²⁴⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

724685 is a deficient number, since it is larger than the sum of its proper divisors (211915).

724685 is a wasteful number, since it uses less digits than its factorization.

724685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11167.

The product of its digits is 13440, while the sum is 32.

The square root of 724685 is about 851.2843238308. The cubic root of 724685 is about 89.8220764733.

The spelling of 724685 in words is "seven hundred twenty-four thousand, six hundred eighty-five".