722065 has 4 divisors (see below), whose sum is σ = 866484. Its totient is φ = 577648.

The previous prime is 722063. The next prime is 722069. The reversal of 722065 is 560227.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 118336 + 603729 = 344^2 + 777^2 .

It is a cyclic number.

It is not a de Polignac number, because 722065 - 2¹ = 722063 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

722065 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (722063) 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 3 ways as a sum of consecutive naturals, for example, 72202 + ... + 72211.

It is an arithmetic number, because the mean of its divisors is an integer number (216621).

2⁷²²⁰⁶⁵ is an apocalyptic number.

It is an amenable number.

722065 is a deficient number, since it is larger than the sum of its proper divisors (144419).

722065 is a wasteful number, since it uses less digits than its factorization.

722065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144418.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 722065 is about 849.7440791203. The cubic root of 722065 is about 89.7136992624.

The spelling of 722065 in words is "seven hundred twenty-two thousand, sixty-five".