722401 has 4 divisors (see below), whose sum is σ = 727812. Its totient is φ = 716992.

The previous prime is 722389. The next prime is 722411. The reversal of 722401 is 104227.

722401 = 24⁴ + 25⁴.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104227 = 17 ⋅6131.

It can be written as a sum of positive squares in 2 ways, for example, as 390625 + 331776 = 625^2 + 576^2 .

It is a cyclic number.

It is not a de Polignac number, because 722401 - 2⁵ = 722369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722411) 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, 2500 + ... + 2773.

It is an arithmetic number, because the mean of its divisors is an integer number (181953).

2⁷²²⁴⁰¹ is an apocalyptic number.

It is an amenable number.

722401 is a deficient number, since it is larger than the sum of its proper divisors (5411).

722401 is a wasteful number, since it uses less digits than its factorization.

722401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5410.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 722401 is about 849.9417627108. The cubic root of 722401 is about 89.7276126583.

Adding to 722401 its reverse (104227), we get a palindrome (826628).

The spelling of 722401 in words is "seven hundred twenty-two thousand, four hundred one", and thus it is an iban number.