722500 has 45 divisors (see below), whose sum is σ = 1678369. Its totient is φ = 272000.

The previous prime is 722489. The next prime is 722509. The reversal of 722500 is 5227.

It is a happy number.

The square root of 722500 is 850.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 352836 + 369664 = 594^2 + 608^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722509) 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 14 ways as a sum of consecutive naturals, for example, 42492 + ... + 42508.

2⁷²²⁵⁰⁰ is an apocalyptic number.

722500 is the 850-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 722500

722500 is an abundant number, since it is smaller than the sum of its proper divisors (955869).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

722500 is a wasteful number, since it uses less digits than its factorization.

722500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58 (or 24 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 16.

The cubic root of 722500 is about 89.7317113181.

Multiplying 722500 by its sum of digits (16), we get a square (11560000 = 3400²).

Adding to 722500 its reverse (5227), we get a palindrome (727727).

The spelling of 722500 in words is "seven hundred twenty-two thousand, five hundred".