4118221 has 4 divisors (see below), whose sum is σ = 4128700. Its totient is φ = 4107744.

The previous prime is 4118201. The next prime is 4118227. The reversal of 4118221 is 1228114.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2528100 + 1590121 = 1590^2 + 1261^2 .

It is a cyclic number.

It is not a de Polignac number, because 4118221 - 2⁹ = 4117709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4118227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4626 + ... + 5443.

It is an arithmetic number, because the mean of its divisors is an integer number (1032175).

Almost surely, 2^4118221 is an apocalyptic number.

It is an amenable number.

4118221 is a deficient number, since it is larger than the sum of its proper divisors (10479).

4118221 is a wasteful number, since it uses less digits than its factorization.

4118221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10478.

The product of its digits is 128, while the sum is 19.

The square root of 4118221 is about 2029.3400405058. The cubic root of 4118221 is about 160.2888142882.

The spelling of 4118221 in words is "four million, one hundred eighteen thousand, two hundred twenty-one".