4228391 has 2 divisors, whose sum is σ = 4228392. Its totient is φ = 4228390.

The previous prime is 4228387. The next prime is 4228423. The reversal of 4228391 is 1938224.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4228391 - 2² = 4228387 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4228351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2114195 + 2114196.

It is an arithmetic number, because the mean of its divisors is an integer number (2114196).

Almost surely, 2^4228391 is an apocalyptic number.

4228391 is a deficient number, since it is larger than the sum of its proper divisors (1).

4228391 is an equidigital number, since it uses as much as digits as its factorization.

4228391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 29.

The square root of 4228391 is about 2056.3051816304. The cubic root of 4228391 is about 161.7055949524.

The spelling of 4228391 in words is "four million, two hundred twenty-eight thousand, three hundred ninety-one".