722985 has 16 divisors (see below), whose sum is σ = 1167936. Its totient is φ = 381888.

The previous prime is 722983. The next prime is 723029. The reversal of 722985 is 589227.

It is not a de Polignac number, because 722985 - 2¹ = 722983 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (722983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2202 + ... + 2508.

It is an arithmetic number, because the mean of its divisors is an integer number (72996).

2⁷²²⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

722985 is a deficient number, since it is larger than the sum of its proper divisors (444951).

722985 is a wasteful number, since it uses less digits than its factorization.

722985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472.

The product of its digits is 10080, while the sum is 33.

The square root of 722985 is about 850.2852462556. The cubic root of 722985 is about 89.7517852031.

The spelling of 722985 in words is "seven hundred twenty-two thousand, nine hundred eighty-five".