4213221 has 8 divisors (see below), whose sum is σ = 5737344. Its totient is φ = 2748960.

The previous prime is 4213217. The next prime is 4213277. The reversal of 4213221 is 1223124.

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

It is not a de Polignac number, because 4213221 - 2² = 4213217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4213221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4215221) 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, 14800 + ... + 15081.

It is an arithmetic number, because the mean of its divisors is an integer number (717168).

Almost surely, 2^4213221 is an apocalyptic number.

It is an amenable number.

4213221 is a deficient number, since it is larger than the sum of its proper divisors (1524123).

4213221 is a wasteful number, since it uses less digits than its factorization.

4213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29931.

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

The square root of 4213221 is about 2052.6132124684. The cubic root of 4213221 is about 161.5119820368.

Adding to 4213221 its reverse (1223124), we get a palindrome (5436345).

The spelling of 4213221 in words is "four million, two hundred thirteen thousand, two hundred twenty-one".