4043221 has 16 divisors (see below), whose sum is σ = 5025664. Its totient is φ = 3167424.

The previous prime is 4043191. The next prime is 4043233. The reversal of 4043221 is 1223404.

It is not a de Polignac number, because 4043221 - 2⁵ = 4043189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4043195 and 4043204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4043321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14146 + ... + 14428.

It is an arithmetic number, because the mean of its divisors is an integer number (314104).

Almost surely, 2^4043221 is an apocalyptic number.

It is an amenable number.

4043221 is a deficient number, since it is larger than the sum of its proper divisors (982443).

4043221 is a wasteful number, since it uses less digits than its factorization.

4043221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 4043221 is about 2010.7762182799. The cubic root of 4043221 is about 159.3098003716.

Adding to 4043221 its reverse (1223404), we get a palindrome (5266625).

The spelling of 4043221 in words is "four million, forty-three thousand, two hundred twenty-one".