2121304 has 8 divisors (see below), whose sum is σ = 3977460. Its totient is φ = 1060648.

The previous prime is 2121289. The next prime is 2121323. The reversal of 2121304 is 4031212.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132574 + ... + 132589.

2^2121304 is an apocalyptic number.

It is an amenable number.

2121304 is a deficient number, since it is larger than the sum of its proper divisors (1856156).

2121304 is a wasteful number, since it uses less digits than its factorization.

2121304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265169 (or 265165 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2121304 is about 1456.4697044566. The cubic root of 2121304 is about 128.4894993615.

Adding to 2121304 its reverse (4031212), we get a palindrome (6152516).

The spelling of 2121304 in words is "two million, one hundred twenty-one thousand, three hundred four".