8441821 has 2 divisors, whose sum is σ = 8441822. Its totient is φ = 8441820.

The previous prime is 8441801. The next prime is 8441831. The reversal of 8441821 is 1281448.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7784100 + 657721 = 2790^2 + 811^2 .

It is a cyclic number.

It is not a de Polignac number, because 8441821 - 2⁵ = 8441789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8441821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8441801) 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, 4220910 + 4220911.

It is an arithmetic number, because the mean of its divisors is an integer number (4220911).

Almost surely, 2^8441821 is an apocalyptic number.

It is an amenable number.

8441821 is a deficient number, since it is larger than the sum of its proper divisors (1).

8441821 is an equidigital number, since it uses as much as digits as its factorization.

8441821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2048, while the sum is 28.

The square root of 8441821 is about 2905.4811993885. The cubic root of 8441821 is about 203.6160679020.

It can be divided in two parts, 84 and 41821, that added together give a triangular number (41905 = T₂₈₉).

The spelling of 8441821 in words is "eight million, four hundred forty-one thousand, eight hundred twenty-one".