722529 has 12 divisors (see below), whose sum is σ = 1068496. Its totient is φ = 470232.

The previous prime is 722521. The next prime is 722537. The reversal of 722529 is 925227.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (722521) and next prime (722537).

It is not a de Polignac number, because 722529 - 2³ = 722521 is a prime.

It is a Duffinian number.

722529 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (722521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 547 + ... + 1320.

2⁷²²⁵²⁹ is an apocalyptic number.

It is an amenable number.

722529 is a deficient number, since it is larger than the sum of its proper divisors (345967).

722529 is a wasteful number, since it uses less digits than its factorization.

722529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1916 (or 1913 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 722529 is about 850.0170586524. The cubic root of 722529 is about 89.7329118648.

It can be divided in two parts, 72 and 2529, that added together give a square (2601 = 51²).

The spelling of 722529 in words is "seven hundred twenty-two thousand, five hundred twenty-nine".