4221247 has 2 divisors, whose sum is σ = 4221248. Its totient is φ = 4221246.

The previous prime is 4221229. The next prime is 4221263. The reversal of 4221247 is 7421224.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4221247 - 2¹⁵ = 4188479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4221227) 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, 2110623 + 2110624.

It is an arithmetic number, because the mean of its divisors is an integer number (2110624).

Almost surely, 2^4221247 is an apocalyptic number.

4221247 is a deficient number, since it is larger than the sum of its proper divisors (1).

4221247 is an equidigital number, since it uses as much as digits as its factorization.

4221247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 896, while the sum is 22.

The square root of 4221247 is about 2054.5673510499. The cubic root of 4221247 is about 161.6144747148.

The spelling of 4221247 in words is "four million, two hundred twenty-one thousand, two hundred forty-seven".