2140565 has 12 divisors (see below), whose sum is σ = 2988396. Its totient is φ = 1467648.

The previous prime is 2140549. The next prime is 2140573. The reversal of 2140565 is 5650412.

It can be written as a sum of positive squares in 2 ways, for example, as 790321 + 1350244 = 889^2 + 1162^2 .

It is not a de Polignac number, because 2140565 - 2⁴ = 2140549 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 2140565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4124 + ... + 4613.

It is an arithmetic number, because the mean of its divisors is an integer number (249033).

2^2140565 is an apocalyptic number.

It is an amenable number.

2140565 is a deficient number, since it is larger than the sum of its proper divisors (847831).

2140565 is an equidigital number, since it uses as much as digits as its factorization.

2140565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8756 (or 8749 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2140565 is about 1463.0669841125. The cubic root of 2140565 is about 128.8772142561.

Adding to 2140565 its reverse (5650412), we get a palindrome (7790977).

The spelling of 2140565 in words is "two million, one hundred forty thousand, five hundred sixty-five".