2365865 has 4 divisors (see below), whose sum is σ = 2839044. Its totient is φ = 1892688.

The previous prime is 2365859. The next prime is 2365879. The reversal of 2365865 is 5685632.

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 1075369 + 1290496 = 1037^2 + 1136^2 .

It is a cyclic number.

It is not a de Polignac number, because 2365865 - 2¹⁰ = 2364841 is a prime.

It is a d-powerful number, because it can be written as 2¹⁸ + 3⁴ + 6 + 5⁴ + 8⁵ + 6⁸ + 5⁸ .

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236582 + ... + 236591.

It is an arithmetic number, because the mean of its divisors is an integer number (709761).

2^2365865 is an apocalyptic number.

It is an amenable number.

2365865 is a deficient number, since it is larger than the sum of its proper divisors (473179).

2365865 is an equidigital number, since it uses as much as digits as its factorization.

2365865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473178.

The product of its digits is 43200, while the sum is 35.

The square root of 2365865 is about 1538.1368599705. The cubic root of 2365865 is about 133.2488040612.

The spelling of 2365865 in words is "two million, three hundred sixty-five thousand, eight hundred sixty-five".