722504 has 8 divisors (see below), whose sum is σ = 1354710. Its totient is φ = 361248.

The previous prime is 722489. The next prime is 722509. The reversal of 722504 is 405227.

It can be written as a sum of positive squares in only one way, i.e., 722500 + 4 = 850^2 + 2^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (722509) by changing a digit.

722504 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 45149 + ... + 45164.

2⁷²²⁵⁰⁴ is an apocalyptic number.

It is an amenable number.

722504 is a deficient number, since it is larger than the sum of its proper divisors (632206).

722504 is a wasteful number, since it uses less digits than its factorization.

722504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90319 (or 90315 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 722504 is about 850.0023529379. The cubic root of 722504 is about 89.7318769127.

The spelling of 722504 in words is "seven hundred twenty-two thousand, five hundred four".