4220243 has 2 divisors, whose sum is σ = 4220244. Its totient is φ = 4220242.

The previous prime is 4220239. The next prime is 4220269. The reversal of 4220243 is 3420224.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4220243 - 2² = 4220239 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 4⁴ + 2⁷ + 2¹⁹ + 0 + 2²¹ + 4⁶ + 3¹³ .

It is not a weakly prime, because it can be changed into another prime (4220143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110121 + 2110122.

It is an arithmetic number, because the mean of its divisors is an integer number (2110122).

Almost surely, 2^4220243 is an apocalyptic number.

4220243 is a deficient number, since it is larger than the sum of its proper divisors (1).

4220243 is an equidigital number, since it uses as much as digits as its factorization.

4220243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 4220243 is about 2054.3230028406. The cubic root of 4220243 is about 161.6016606657.

Adding to 4220243 its reverse (3420224), we get a palindrome (7640467).

The spelling of 4220243 in words is "four million, two hundred twenty thousand, two hundred forty-three".