720587 has 8 divisors (see below), whose sum is σ = 828672. Its totient is φ = 613800.

The previous prime is 720571. The next prime is 720607. The reversal of 720587 is 785027.

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 720587 - 2⁴ = 720571 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 720587.

It is not an unprimeable number, because it can be changed into a prime (720527) 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, 2012 + ... + 2342.

It is an arithmetic number, because the mean of its divisors is an integer number (103584).

2⁷²⁰⁵⁸⁷ is an apocalyptic number.

720587 is a deficient number, since it is larger than the sum of its proper divisors (108085).

720587 is a wasteful number, since it uses less digits than its factorization.

720587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 720587 is about 848.8739600200. The cubic root of 720587 is about 89.6524455795.

The spelling of 720587 in words is "seven hundred twenty thousand, five hundred eighty-seven".