720245 has 8 divisors (see below), whose sum is σ = 902016. Its totient is φ = 551056.

The previous prime is 720241. The next prime is 720253. The reversal of 720245 is 542027.

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 720245 - 2² = 720241 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3017 + ... + 3246.

It is an arithmetic number, because the mean of its divisors is an integer number (112752).

2⁷²⁰²⁴⁵ is an apocalyptic number.

It is an amenable number.

720245 is a deficient number, since it is larger than the sum of its proper divisors (181771).

720245 is a wasteful number, since it uses less digits than its factorization.

720245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6291.

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 720245 is about 848.6724927792. The cubic root of 720245 is about 89.6382599279.

It can be divided in two parts, 720 and 245, that multiplied together give a square (176400 = 420²).

The spelling of 720245 in words is "seven hundred twenty thousand, two hundred forty-five".