4055221 has 2 divisors, whose sum is σ = 4055222. Its totient is φ = 4055220.

The previous prime is 4055179. The next prime is 4055257. The reversal of 4055221 is 1225504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2686321 + 1368900 = 1639^2 + 1170^2 .

It is a cyclic number.

It is not a de Polignac number, because 4055221 - 2⁹ = 4054709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4055281) 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, 2027610 + 2027611.

It is an arithmetic number, because the mean of its divisors is an integer number (2027611).

Almost surely, 2^4055221 is an apocalyptic number.

It is an amenable number.

4055221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4055221 is an equidigital number, since it uses as much as digits as its factorization.

4055221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 4055221 is about 2013.7579298416. The cubic root of 4055221 is about 159.4672515255.

The spelling of 4055221 in words is "four million, fifty-five thousand, two hundred twenty-one".