3827221 has 2 divisors, whose sum is σ = 3827222. Its totient is φ = 3827220.

The previous prime is 3827209. The next prime is 3827231. The reversal of 3827221 is 1227283.

3827221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3591025 + 236196 = 1895^2 + 486^2 .

It is a cyclic number.

It is not a de Polignac number, because 3827221 - 2⁷ = 3827093 is a prime.

3827221 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3827231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1913610 + 1913611.

It is an arithmetic number, because the mean of its divisors is an integer number (1913611).

Almost surely, 2^3827221 is an apocalyptic number.

It is an amenable number.

3827221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3827221 is an equidigital number, since it uses as much as digits as its factorization.

3827221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 25.

The square root of 3827221 is about 1956.3284489063. The cubic root of 3827221 is about 156.4208039385.

The spelling of 3827221 in words is "three million, eight hundred twenty-seven thousand, two hundred twenty-one".