2844221 has 2 divisors, whose sum is σ = 2844222. Its totient is φ = 2844220.

The previous prime is 2844199. The next prime is 2844223. The reversal of 2844221 is 1224482.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2059225 + 784996 = 1435^2 + 886^2 .

It is a cyclic number.

It is not a de Polignac number, because 2844221 - 2¹⁸ = 2582077 is a prime.

It is a Sophie Germain prime.

Together with 2844223, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2844223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1422110 + 1422111.

It is an arithmetic number, because the mean of its divisors is an integer number (1422111).

2^2844221 is an apocalyptic number.

It is an amenable number.

2844221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2844221 is an equidigital number, since it uses as much as digits as its factorization.

2844221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1024, while the sum is 23.

The square root of 2844221 is about 1686.4818409933. The cubic root of 2844221 is about 141.6840990467.

The spelling of 2844221 in words is "two million, eight hundred forty-four thousand, two hundred twenty-one".