722516 has 6 divisors (see below), whose sum is σ = 1264410. Its totient is φ = 361256.

The previous prime is 722509. The next prime is 722521. The reversal of 722516 is 615227.

It can be written as a sum of positive squares in only one way, i.e., 722500 + 16 = 850^2 + 4^2 .

It is a junction number, because it is equal to n+sod(n) for n = 722491 and 722500.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 722516.

It is an unprimeable number.

722516 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90311 + ... + 90318.

It is an arithmetic number, because the mean of its divisors is an integer number (210735).

2⁷²²⁵¹⁶ is an apocalyptic number.

It is an amenable number.

722516 is a deficient number, since it is larger than the sum of its proper divisors (541894).

722516 is a wasteful number, since it uses less digits than its factorization.

722516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180633 (or 180631 counting only the distinct ones).

The product of its digits is 840, while the sum is 23.

The square root of 722516 is about 850.0094117126. The cubic root of 722516 is about 89.7323736927.

It can be divided in two parts, 7225 and 16, that multiplied together give a square (115600 = 340²).

The spelling of 722516 in words is "seven hundred twenty-two thousand, five hundred sixteen".