2004421 has 2 divisors, whose sum is σ = 2004422. Its totient is φ = 2004420.

The previous prime is 2004383. The next prime is 2004433. The reversal of 2004421 is 1244002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1852321 + 152100 = 1361^2 + 390^2 .

It is a cyclic number.

It is not a de Polignac number, because 2004421 - 2⁷ = 2004293 is a prime.

It is a Chen prime.

2004421 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2004461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1002210 + 1002211.

It is an arithmetic number, because the mean of its divisors is an integer number (1002211).

2^2004421 is an apocalyptic number.

It is an amenable number.

2004421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2004421 is an equidigital number, since it uses as much as digits as its factorization.

2004421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 2004421 is about 1415.7757590805. The cubic root of 2004421 is about 126.0848718520.

Adding to 2004421 its reverse (1244002), we get a palindrome (3248423).

The spelling of 2004421 in words is "two million, four thousand, four hundred twenty-one".