720247 has 8 divisors (see below), whose sum is σ = 805392. Its totient is φ = 638400.

The previous prime is 720241. The next prime is 720253. The reversal of 720247 is 742027.

It is an interprime number because it is at equal distance from previous prime (720241) and next prime (720253).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-720247 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 (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, 348 + ... + 1249.

It is an arithmetic number, because the mean of its divisors is an integer number (100674).

2⁷²⁰²⁴⁷ is an apocalyptic number.

720247 is a deficient number, since it is larger than the sum of its proper divisors (85145).

720247 is a wasteful number, since it uses less digits than its factorization.

720247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1649.

The product of its (nonzero) digits is 784, while the sum is 22.

The square root of 720247 is about 848.6736710892. The cubic root of 720247 is about 89.6383428980.

The spelling of 720247 in words is "seven hundred twenty thousand, two hundred forty-seven", and thus it is an iban number.