2002321 has 4 divisors (see below), whose sum is σ = 2066944. Its totient is φ = 1937700.

The previous prime is 2002313. The next prime is 2002327. The reversal of 2002321 is 1232002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2002321 - 2³ = 2002313 is a prime.

It is a Duffinian number.

2002321 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2002298 and 2002307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32265 + ... + 32326.

It is an arithmetic number, because the mean of its divisors is an integer number (516736).

2^2002321 is an apocalyptic number.

It is an amenable number.

2002321 is a deficient number, since it is larger than the sum of its proper divisors (64623).

2002321 is an equidigital number, since it uses as much as digits as its factorization.

2002321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64622.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 2002321 is about 1415.0339218549. The cubic root of 2002321 is about 126.0408240941.

Adding to 2002321 its reverse (1232002), we get a palindrome (3234323).

The spelling of 2002321 in words is "two million, two thousand, three hundred twenty-one".