720401 has 8 divisors (see below), whose sum is σ = 796800. Its totient is φ = 645840.

The previous prime is 720397. The next prime is 720403. The reversal of 720401 is 104027.

It is a happy number.

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 720401 - 2² = 720397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720403) by changing a digit.

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, 455 + ... + 1283.

It is an arithmetic number, because the mean of its divisors is an integer number (99600).

2⁷²⁰⁴⁰¹ is an apocalyptic number.

It is an amenable number.

720401 is a deficient number, since it is larger than the sum of its proper divisors (76399).

720401 is a wasteful number, since it uses less digits than its factorization.

720401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919.

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 720401 is about 848.7643960488. The cubic root of 720401 is about 89.6447311329.

Adding to 720401 its reverse (104027), we get a palindrome (824428).

The spelling of 720401 in words is "seven hundred twenty thousand, four hundred one", and thus it is an iban number.