4213421 has 8 divisors (see below), whose sum is σ = 4480320. Its totient is φ = 3951072.

The previous prime is 4213411. The next prime is 4213423. The reversal of 4213421 is 1243124.

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

It is a cyclic number.

It is not a de Polignac number, because 4213421 - 2⁶ = 4213357 is a prime.

It is a d-powerful number, because it can be written as 4⁷ + 2⁵ + 1 + 3⁷ + 4¹¹ + 2⁹ + 1 .

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 4213421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4213423) 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, 881 + ... + 3033.

It is an arithmetic number, because the mean of its divisors is an integer number (560040).

Almost surely, 2^4213421 is an apocalyptic number.

It is an amenable number.

4213421 is a deficient number, since it is larger than the sum of its proper divisors (266899).

4213421 is a wasteful number, since it uses less digits than its factorization.

4213421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2275.

The product of its digits is 192, while the sum is 17.

The square root of 4213421 is about 2052.6619302749. The cubic root of 4213421 is about 161.5145376338.

Adding to 4213421 its reverse (1243124), we get a palindrome (5456545).

The spelling of 4213421 in words is "four million, two hundred thirteen thousand, four hundred twenty-one".