4220449 has 2 divisors, whose sum is σ = 4220450. Its totient is φ = 4220448.

The previous prime is 4220441. The next prime is 4220473. The reversal of 4220449 is 9440224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3489424 + 731025 = 1868^2 + 855^2 .

It is a cyclic number.

It is not a de Polignac number, because 4220449 - 2³ = 4220441 is a prime.

It is a d-powerful number, because it can be written as 4⁵ + 2⁷ + 2¹¹ + 0 + 4⁷ + 4¹¹ + 9⁴ .

It is not a weakly prime, because it can be changed into another prime (4220441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110224 + 2110225.

It is an arithmetic number, because the mean of its divisors is an integer number (2110225).

Almost surely, 2^4220449 is an apocalyptic number.

It is an amenable number.

4220449 is a deficient number, since it is larger than the sum of its proper divisors (1).

4220449 is an equidigital number, since it uses as much as digits as its factorization.

4220449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 4220449 is about 2054.3731404007. The cubic root of 4220449 is about 161.6042900088.

It can be divided in two parts, 42 and 20449, that multiplied together give a palindrome (858858).

The spelling of 4220449 in words is "four million, two hundred twenty thousand, four hundred forty-nine".