2020565 has 4 divisors (see below), whose sum is σ = 2424684. Its totient is φ = 1616448.

The previous prime is 2020561. The next prime is 2020591. The reversal of 2020565 is 5650202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5650202 = 2 ⋅2825101.

It can be written as a sum of positive squares in 2 ways, for example, as 208849 + 1811716 = 457^2 + 1346^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020565 - 2² = 2020561 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202052 + ... + 202061.

It is an arithmetic number, because the mean of its divisors is an integer number (606171).

2^2020565 is an apocalyptic number.

It is an amenable number.

2020565 is a deficient number, since it is larger than the sum of its proper divisors (404119).

2020565 is an equidigital number, since it uses as much as digits as its factorization.

2020565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404118.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 2020565 is about 1421.4657927646. The cubic root of 2020565 is about 126.4224712025.

Adding to 2020565 its reverse (5650202), we get a palindrome (7670767).

The spelling of 2020565 in words is "two million, twenty thousand, five hundred sixty-five".