722518 has 8 divisors (see below), whose sum is σ = 1089000. Its totient is φ = 359520.

The previous prime is 722509. The next prime is 722521. The reversal of 722518 is 815227.

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

It is a junction number, because it is equal to n+sod(n) for n = 722492 and 722501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268 + ... + 1231.

It is an arithmetic number, because the mean of its divisors is an integer number (136125).

2⁷²²⁵¹⁸ is an apocalyptic number.

722518 is a deficient number, since it is larger than the sum of its proper divisors (366482).

722518 is a wasteful number, since it uses less digits than its factorization.

722518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1742.

The product of its digits is 1120, while the sum is 25.

The square root of 722518 is about 850.0105881693. The cubic root of 722518 is about 89.7324564888.

The spelling of 722518 in words is "seven hundred twenty-two thousand, five hundred eighteen".