2021304 has 16 divisors (see below), whose sum is σ = 5053320. Its totient is φ = 673760.

The previous prime is 2021291. The next prime is 2021321. The reversal of 2021304 is 4031202.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 2021304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42087 + ... + 42134.

2^2021304 is an apocalyptic number.

2021304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2021304 is an abundant number, since it is smaller than the sum of its proper divisors (3032016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2021304 is a wasteful number, since it uses less digits than its factorization.

2021304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84230 (or 84226 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 2021304 is about 1421.7257119431. The cubic root of 2021304 is about 126.4378818786.

Adding to 2021304 its reverse (4031202), we get a palindrome (6052506).

The spelling of 2021304 in words is "two million, twenty-one thousand, three hundred four".