722499 has 16 divisors (see below), whose sum is σ = 1036032. Its totient is φ = 446688.

The previous prime is 722489. The next prime is 722509. The reversal of 722499 is 994227.

It is a Cunningham number, because it is equal to 850²-1.

It is an interprime number because it is at equal distance from previous prime (722489) and next prime (722509).

It is not a de Polignac number, because 722499 - 2⁵ = 722467 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2412 + ... + 2694.

It is an arithmetic number, because the mean of its divisors is an integer number (64752).

2⁷²²⁴⁹⁹ is an apocalyptic number.

722499 is a deficient number, since it is larger than the sum of its proper divisors (313533).

722499 is a wasteful number, since it uses less digits than its factorization.

722499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346.

The product of its digits is 9072, while the sum is 33.

The square root of 722499 is about 849.9994117645. Note that the first 3 decimals coincide. The cubic root of 722499 is about 89.7316699194.

It can be divided in two parts, 722 and 499, that added together give a palindrome (1221).

The spelling of 722499 in words is "seven hundred twenty-two thousand, four hundred ninety-nine".