2090565 has 12 divisors (see below), whose sum is σ = 3623724. Its totient is φ = 1114944.

The previous prime is 2090509. The next prime is 2090567. The reversal of 2090565 is 5650902.

It can be written as a sum of positive squares in 2 ways, for example, as 1285956 + 804609 = 1134^2 + 897^2 .

It is not a de Polignac number, because 2090565 - 2¹⁰ = 2089541 is a prime.

It is a super-3 number, since 3×2090565³ = 27410204793663336375, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2090567) 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 11 ways as a sum of consecutive naturals, for example, 23184 + ... + 23273.

It is an arithmetic number, because the mean of its divisors is an integer number (301977).

2^2090565 is an apocalyptic number.

It is an amenable number.

2090565 is a deficient number, since it is larger than the sum of its proper divisors (1533159).

2090565 is a wasteful number, since it uses less digits than its factorization.

2090565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46468 (or 46465 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 2090565 is about 1445.8786256114. The cubic root of 2090565 is about 127.8658465884.

The spelling of 2090565 in words is "two million, ninety thousand, five hundred sixty-five".