4221271 has 2 divisors, whose sum is σ = 4221272. Its totient is φ = 4221270.

The previous prime is 4221263. The next prime is 4221281. The reversal of 4221271 is 1721224.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4221271 - 2³ = 4221263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4221281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110635 + 2110636.

It is an arithmetic number, because the mean of its divisors is an integer number (2110636).

Almost surely, 2^4221271 is an apocalyptic number.

4221271 is a deficient number, since it is larger than the sum of its proper divisors (1).

4221271 is an equidigital number, since it uses as much as digits as its factorization.

4221271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 224, while the sum is 19.

The square root of 4221271 is about 2054.5731916873. The cubic root of 4221271 is about 161.6147810018.

Adding to 4221271 its reverse (1721224), we get a palindrome (5942495).

The spelling of 4221271 in words is "four million, two hundred twenty-one thousand, two hundred seventy-one".