720811 has 12 divisors (see below), whose sum is σ = 897232. Its totient is φ = 563904.

The previous prime is 720793. The next prime is 720829. The reversal of 720811 is 118027.

It is an interprime number because it is at equal distance from previous prime (720793) and next prime (720829).

It is not a de Polignac number, because 720811 - 2⁵ = 720779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (720211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8055 + ... + 8143.

2⁷²⁰⁸¹¹ is an apocalyptic number.

720811 is a deficient number, since it is larger than the sum of its proper divisors (176421).

720811 is an equidigital number, since it uses as much as digits as its factorization.

720811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 720811 is about 849.0058892611. The cubic root of 720811 is about 89.6617343340.

Adding to 720811 its reverse (118027), we get a palindrome (838838).

The spelling of 720811 in words is "seven hundred twenty thousand, eight hundred eleven".