2039865 has 16 divisors (see below), whose sum is σ = 3283200. Its totient is φ = 1081472.

The previous prime is 2039857. The next prime is 2039867. The reversal of 2039865 is 5689302.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2039865 - 2³ = 2039857 is a prime.

It is a super-2 number, since 2×2039865² = 8322098436450, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹⁵ + 0 + 3⁵ + 9⁴ + 8³ + 6⁶ + 5⁹ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2039867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3301 + ... + 3869.

It is an arithmetic number, because the mean of its divisors is an integer number (205200).

2^2039865 is an apocalyptic number.

It is an amenable number.

2039865 is a deficient number, since it is larger than the sum of its proper divisors (1243335).

2039865 is a wasteful number, since it uses less digits than its factorization.

2039865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 2039865 is about 1428.2384254738. The cubic root of 2039865 is about 126.8237164023.

The spelling of 2039865 in words is "two million, thirty-nine thousand, eight hundred sixty-five".