720057 has 16 divisors (see below), whose sum is σ = 1064000. Its totient is φ = 430272.

The previous prime is 720053. The next prime is 720059. The reversal of 720057 is 750027.

It is not a de Polignac number, because 720057 - 2² = 720053 is a prime.

It is a Duffinian number.

720057 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 720057.

It is not an unprimeable number, because it can be changed into a prime (720053) 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 15 ways as a sum of consecutive naturals, for example, 1194 + ... + 1692.

It is an arithmetic number, because the mean of its divisors is an integer number (66500).

2⁷²⁰⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

720057 is a deficient number, since it is larger than the sum of its proper divisors (343943).

720057 is a wasteful number, since it uses less digits than its factorization.

720057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552.

The product of its (nonzero) digits is 490, while the sum is 21.

The square root of 720057 is about 848.5617243312. The cubic root of 720057 is about 89.6304600546.

The spelling of 720057 in words is "seven hundred twenty thousand, fifty-seven".