724401 has 6 divisors (see below), whose sum is σ = 1046370. Its totient is φ = 482928.

The previous prime is 724393. The next prime is 724403. The reversal of 724401 is 104427.

Added to its reverse (104427) it gives a triangular number (828828 = T₁₂₈₇).

It is a happy number.

724401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 720801 + 3600 = 849^2 + 60^2 .

It is not a de Polignac number, because 724401 - 2³ = 724393 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (724403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40236 + ... + 40253.

It is an arithmetic number, because the mean of its divisors is an integer number (174395).

2⁷²⁴⁴⁰¹ is an apocalyptic number.

It is an amenable number.

724401 is a deficient number, since it is larger than the sum of its proper divisors (321969).

724401 is a wasteful number, since it uses less digits than its factorization.

724401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80495 (or 80492 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 724401 is about 851.1175007013. The cubic root of 724401 is about 89.8103413503.

Adding to 724401 its reverse (104427), we get a palindrome (828828).

The spelling of 724401 in words is "seven hundred twenty-four thousand, four hundred one", and thus it is an iban number.