2720065 has 4 divisors (see below), whose sum is σ = 3264084. Its totient is φ = 2176048.

The previous prime is 2720009. The next prime is 2720071. The reversal of 2720065 is 5600272.

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 1915456 + 804609 = 1384^2 + 897^2 .

It is a cyclic number.

It is not a de Polignac number, because 2720065 - 2⁹ = 2719553 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.

It is an unprimeable number.

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, 272002 + ... + 272011.

It is an arithmetic number, because the mean of its divisors is an integer number (816021).

2^2720065 is an apocalyptic number.

It is an amenable number.

2720065 is a deficient number, since it is larger than the sum of its proper divisors (544019).

2720065 is an equidigital number, since it uses as much as digits as its factorization.

2720065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544018.

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

The square root of 2720065 is about 1649.2619561489. The cubic root of 2720065 is about 139.5917528646.

The spelling of 2720065 in words is "two million, seven hundred twenty thousand, sixty-five".