720251 has 6 divisors (see below), whose sum is σ = 837900. Its totient is φ = 617316.

The previous prime is 720241. The next prime is 720253. The reversal of 720251 is 152027.

It is not a de Polignac number, because 720251 - 2¹⁰ = 719227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (720253) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7301 + ... + 7398.

It is an arithmetic number, because the mean of its divisors is an integer number (139650).

2⁷²⁰²⁵¹ is an apocalyptic number.

720251 is a deficient number, since it is larger than the sum of its proper divisors (117649).

720251 is a wasteful number, since it uses less digits than its factorization.

720251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14713 (or 14706 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 720251 is about 848.6760277043. The cubic root of 720251 is about 89.6385088377.

Adding to 720251 its reverse (152027), we get a palindrome (872278).

The spelling of 720251 in words is "seven hundred twenty thousand, two hundred fifty-one".