4221571 has 2 divisors, whose sum is σ = 4221572. Its totient is φ = 4221570.

The previous prime is 4221563. The next prime is 4221577. The reversal of 4221571 is 1751224.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4221571 - 2³ = 4221563 is a prime.

4221571 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (4221577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110785 + 2110786.

It is an arithmetic number, because the mean of its divisors is an integer number (2110786).

Almost surely, 2^4221571 is an apocalyptic number.

4221571 is a deficient number, since it is larger than the sum of its proper divisors (1).

4221571 is an equidigital number, since it uses as much as digits as its factorization.

4221571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 560, while the sum is 22.

The square root of 4221571 is about 2054.6461982541. The cubic root of 4221571 is about 161.6186094922.

Adding to 4221571 its reverse (1751224), we get a palindrome (5972795).

The spelling of 4221571 in words is "four million, two hundred twenty-one thousand, five hundred seventy-one".