724345 has 8 divisors (see below), whose sum is σ = 873864. Its totient is φ = 576384.

The previous prime is 724331. The next prime is 724393. The reversal of 724345 is 543427.

It can be written as a sum of positive squares in 4 ways, for example, as 45369 + 678976 = 213^2 + 824^2 .

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 724345 - 2⁵ = 724313 is a prime.

It is a Duffinian number.

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, 1357 + ... + 1813.

It is an arithmetic number, because the mean of its divisors is an integer number (109233).

2⁷²⁴³⁴⁵ is an apocalyptic number.

It is an amenable number.

724345 is a deficient number, since it is larger than the sum of its proper divisors (149519).

724345 is a wasteful number, since it uses less digits than its factorization.

724345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779.

The product of its digits is 3360, while the sum is 25.

The square root of 724345 is about 851.0846021401. The cubic root of 724345 is about 89.8080270204.

The spelling of 724345 in words is "seven hundred twenty-four thousand, three hundred forty-five".