724585 has 4 divisors (see below), whose sum is σ = 869508. Its totient is φ = 579664.

The previous prime is 724583. The next prime is 724597. The reversal of 724585 is 585427.

724585 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 585427 = 151 ⋅3877.

It can be written as a sum of positive squares in 2 ways, for example, as 458329 + 266256 = 677^2 + 516^2 .

It is a cyclic number.

It is not a de Polignac number, because 724585 - 2¹ = 724583 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (724583) 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, 72454 + ... + 72463.

It is an arithmetic number, because the mean of its divisors is an integer number (217377).

2⁷²⁴⁵⁸⁵ is an apocalyptic number.

It is an amenable number.

724585 is a deficient number, since it is larger than the sum of its proper divisors (144923).

724585 is a wasteful number, since it uses less digits than its factorization.

724585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144922.

The product of its digits is 11200, while the sum is 31.

The square root of 724585 is about 851.2255870214. The cubic root of 724585 is about 89.8179447375.

The spelling of 724585 in words is "seven hundred twenty-four thousand, five hundred eighty-five".