4218849 has 6 divisors (see below), whose sum is σ = 6093906. Its totient is φ = 2812560.

The previous prime is 4218847. The next prime is 4218857. The reversal of 4218849 is 9488124.

It can be written as a sum of positive squares in only one way, i.e., 3629025 + 589824 = 1905^2 + 768^2 .

It is not a de Polignac number, because 4218849 - 2¹ = 4218847 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4218847) 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 in 5 ways as a sum of consecutive naturals, for example, 234372 + ... + 234389.

It is an arithmetic number, because the mean of its divisors is an integer number (1015651).

Almost surely, 2^4218849 is an apocalyptic number.

It is an amenable number.

4218849 is a deficient number, since it is larger than the sum of its proper divisors (1875057).

4218849 is a wasteful number, since it uses less digits than its factorization.

4218849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468767 (or 468764 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 4218849 is about 2053.9836902955. The cubic root of 4218849 is about 161.5838656775.

The spelling of 4218849 in words is "four million, two hundred eighteen thousand, eight hundred forty-nine".