4204421 has 8 divisors (see below), whose sum is σ = 4650744. Its totient is φ = 3775680.

The previous prime is 4204379. The next prime is 4204429. The reversal of 4204421 is 1244024.

It can be written as a sum of positive squares in 4 ways, for example, as 264196 + 3940225 = 514^2 + 1985^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4204421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4204421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4204429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3890 + ... + 4851.

It is an arithmetic number, because the mean of its divisors is an integer number (581343).

Almost surely, 2^4204421 is an apocalyptic number.

It is an amenable number.

4204421 is a deficient number, since it is larger than the sum of its proper divisors (446323).

4204421 is a wasteful number, since it uses less digits than its factorization.

4204421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8791.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 4204421 is about 2050.4684830545. The cubic root of 4204421 is about 161.3994556083.

Adding to 4204421 its reverse (1244024), we get a palindrome (5448445).

The spelling of 4204421 in words is "four million, two hundred four thousand, four hundred twenty-one".