2002865 has 8 divisors (see below), whose sum is σ = 2411880. Its totient is φ = 1596672.

The previous prime is 2002853. The next prime is 2002867. The reversal of 2002865 is 5682002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 185761 + 1817104 = 431^2 + 1348^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2002865 - 2¹⁶ = 1937329 is a prime.

It is a super-2 number, since 2×2002865² = 8022936416450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2002865.

It is not an unprimeable number, because it can be changed into a prime (2002867) 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 7 ways as a sum of consecutive naturals, for example, 1481 + ... + 2489.

It is an arithmetic number, because the mean of its divisors is an integer number (301485).

2^2002865 is an apocalyptic number.

It is an amenable number.

2002865 is a deficient number, since it is larger than the sum of its proper divisors (409015).

2002865 is a wasteful number, since it uses less digits than its factorization.

2002865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1411.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 2002865 is about 1415.2261303410. The cubic root of 2002865 is about 126.0522375155.

Adding to 2002865 its reverse (5682002), we get a palindrome (7684867).

The spelling of 2002865 in words is "two million, two thousand, eight hundred sixty-five".