2002665 has 16 divisors (see below), whose sum is σ = 3662208. Its totient is φ = 915456.

The previous prime is 2002661. The next prime is 2002667. The reversal of 2002665 is 5662002.

It is not a de Polignac number, because 2002665 - 2² = 2002661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (2002661) 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 15 ways as a sum of consecutive naturals, for example, 9432 + ... + 9641.

It is an arithmetic number, because the mean of its divisors is an integer number (228888).

2^2002665 is an apocalyptic number.

It is an amenable number.

2002665 is a deficient number, since it is larger than the sum of its proper divisors (1659543).

2002665 is a wasteful number, since it uses less digits than its factorization.

2002665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19088.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 2002665 is about 1415.1554684910. The cubic root of 2002665 is about 126.0480416449.

Adding to 2002665 its reverse (5662002), we get a palindrome (7664667).

The spelling of 2002665 in words is "two million, two thousand, six hundred sixty-five".