722565 has 12 divisors (see below), whose sum is σ = 1252524. Its totient is φ = 385344.

The previous prime is 722563. The next prime is 722581. The reversal of 722565 is 565227.

It can be written as a sum of positive squares in 2 ways, for example, as 294849 + 427716 = 543^2 + 654^2 .

It is not a de Polignac number, because 722565 - 2¹ = 722563 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722563) 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, 7984 + ... + 8073.

It is an arithmetic number, because the mean of its divisors is an integer number (104377).

2⁷²²⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

722565 is a deficient number, since it is larger than the sum of its proper divisors (529959).

722565 is a wasteful number, since it uses less digits than its factorization.

722565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16068 (or 16065 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 722565 is about 850.0382344342. The cubic root of 722565 is about 89.7344021538.

The spelling of 722565 in words is "seven hundred twenty-two thousand, five hundred sixty-five".