2820065 has 4 divisors (see below), whose sum is σ = 3384084. Its totient is φ = 2256048.

The previous prime is 2820043. The next prime is 2820071. The reversal of 2820065 is 5600282.

It is a happy number.

2820065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5600282 = 2 ⋅2800141.

It can be written as a sum of positive squares in 2 ways, for example, as 1067089 + 1752976 = 1033^2 + 1324^2 .

It is a cyclic number.

It is not a de Polignac number, because 2820065 - 2⁶ = 2820001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2820065.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282002 + ... + 282011.

It is an arithmetic number, because the mean of its divisors is an integer number (846021).

2^2820065 is an apocalyptic number.

It is an amenable number.

2820065 is a deficient number, since it is larger than the sum of its proper divisors (564019).

2820065 is an equidigital number, since it uses as much as digits as its factorization.

2820065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564018.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 2820065 is about 1679.3049157315. The cubic root of 2820065 is about 141.2818499196.

The spelling of 2820065 in words is "two million, eight hundred twenty thousand, sixty-five".