3844021 has 2 divisors, whose sum is σ = 3844022. Its totient is φ = 3844020.

The previous prime is 3844019. The next prime is 3844067. The reversal of 3844021 is 1204483.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3663396 + 180625 = 1914^2 + 425^2 .

It is a cyclic number.

It is not a de Polignac number, because 3844021 - 2¹ = 3844019 is a prime.

Together with 3844019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 3843983 and 3844001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3844121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1922010 + 1922011.

It is an arithmetic number, because the mean of its divisors is an integer number (1922011).

Almost surely, 2^3844021 is an apocalyptic number.

It is an amenable number.

3844021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3844021 is an equidigital number, since it uses as much as digits as its factorization.

3844021 is an evil number, because the sum of its binary digits is even.

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

The square root of 3844021 is about 1960.6175047673. The cubic root of 3844021 is about 156.6493452003.

The spelling of 3844021 in words is "three million, eight hundred forty-four thousand, twenty-one".