720277 has 4 divisors (see below), whose sum is σ = 728460. Its totient is φ = 712096.

The previous prime is 720257. The next prime is 720281. The reversal of 720277 is 772027.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 221841 + 498436 = 471^2 + 706^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-720277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3958 + ... + 4135.

It is an arithmetic number, because the mean of its divisors is an integer number (182115).

2⁷²⁰²⁷⁷ is an apocalyptic number.

It is an amenable number.

720277 is a deficient number, since it is larger than the sum of its proper divisors (8183).

720277 is an equidigital number, since it uses as much as digits as its factorization.

720277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8182.

The product of its (nonzero) digits is 1372, while the sum is 25.

The square root of 720277 is about 848.6913455432. The cubic root of 720277 is about 89.6395874307.

The spelling of 720277 in words is "seven hundred twenty thousand, two hundred seventy-seven", and thus it is an iban number.