4221213 has 16 divisors (see below), whose sum is σ = 5930496. Its totient is φ = 2665520.

The previous prime is 4221209. The next prime is 4221223. The reversal of 4221213 is 3121224.

It is a cyclic number.

It is not a de Polignac number, because 4221213 - 2² = 4221209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4221192 and 4221201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221223) 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, 8806 + ... + 9272.

It is an arithmetic number, because the mean of its divisors is an integer number (370656).

Almost surely, 2^4221213 is an apocalyptic number.

It is an amenable number.

4221213 is a deficient number, since it is larger than the sum of its proper divisors (1709283).

4221213 is a wasteful number, since it uses less digits than its factorization.

4221213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624.

The product of its digits is 96, while the sum is 15.

The square root of 4221213 is about 2054.5590767851. The cubic root of 4221213 is about 161.6140408061.

Adding to 4221213 its reverse (3121224), we get a palindrome (7342437).

The spelling of 4221213 in words is "four million, two hundred twenty-one thousand, two hundred thirteen".