4211818 has 24 divisors (see below), whose sum is σ = 7253388. Its totient is φ = 1827072.

The previous prime is 4211797. The next prime is 4211819. The reversal of 4211818 is 8181124.

It can be written as a sum of positive squares in 6 ways, for example, as 2424249 + 1787569 = 1557^2 + 1337^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4211792 and 4211801.

It is not an unprimeable number, because it can be changed into a prime (4211819) 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 in 11 ways as a sum of consecutive naturals, for example, 5380 + ... + 6112.

Almost surely, 2^4211818 is an apocalyptic number.

4211818 is a deficient number, since it is larger than the sum of its proper divisors (3041570).

4211818 is a wasteful number, since it uses less digits than its factorization.

4211818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778 (or 765 counting only the distinct ones).

The product of its digits is 512, while the sum is 25.

The square root of 4211818 is about 2052.2714245440. The cubic root of 4211818 is about 161.4940522496.

The spelling of 4211818 in words is "four million, two hundred eleven thousand, eight hundred eighteen".