3005221 has 2 divisors, whose sum is σ = 3005222. Its totient is φ = 3005220.

The previous prime is 3005213. The next prime is 3005237. The reversal of 3005221 is 1225003.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2992900 + 12321 = 1730^2 + 111^2 .

It is a cyclic number.

It is not a de Polignac number, because 3005221 - 2³ = 3005213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3005281) 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, 1502610 + 1502611.

It is an arithmetic number, because the mean of its divisors is an integer number (1502611).

Almost surely, 2^3005221 is an apocalyptic number.

It is an amenable number.

3005221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3005221 is an equidigital number, since it uses as much as digits as its factorization.

3005221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 3005221 is about 1733.5573252708. The cubic root of 3005221 is about 144.3085750418.

The spelling of 3005221 in words is "three million, five thousand, two hundred twenty-one".