720550 has 12 divisors (see below), whose sum is σ = 1340316. Its totient is φ = 288200.

The previous prime is 720547. The next prime is 720569. The reversal of 720550 is 55027.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 7156 + ... + 7255.

It is an arithmetic number, because the mean of its divisors is an integer number (111693).

2⁷²⁰⁵⁵⁰ is an apocalyptic number.

720550 is a deficient number, since it is larger than the sum of its proper divisors (619766).

720550 is a wasteful number, since it uses less digits than its factorization.

720550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14423 (or 14418 counting only the distinct ones).

The product of its (nonzero) digits is 350, while the sum is 19.

The square root of 720550 is about 848.8521661632. The cubic root of 720550 is about 89.6509110911.

Adding to 720550 its reverse (55027), we get a palindrome (775577).

The spelling of 720550 in words is "seven hundred twenty thousand, five hundred fifty".