3804421 has 2 divisors, whose sum is σ = 3804422. Its totient is φ = 3804420.

The previous prime is 3804419. The next prime is 3804433. The reversal of 3804421 is 1244083.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3381921 + 422500 = 1839^2 + 650^2 .

It is an emirp because it is prime and its reverse (1244083) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3804421 - 2¹ = 3804419 is a prime.

Together with 3804419, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 3804392 and 3804401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3804491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1902210 + 1902211.

It is an arithmetic number, because the mean of its divisors is an integer number (1902211).

Almost surely, 2^3804421 is an apocalyptic number.

It is an amenable number.

3804421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3804421 is an equidigital number, since it uses as much as digits as its factorization.

3804421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 3804421 is about 1950.4925019082. The cubic root of 3804421 is about 156.1095685435.

It can be divided in two parts, 3804 and 421, that added together give a square (4225 = 65²).

The spelling of 3804421 in words is "three million, eight hundred four thousand, four hundred twenty-one".