4221212 has 6 divisors (see below), whose sum is σ = 7387128. Its totient is φ = 2110604.

The previous prime is 4221209. The next prime is 4221223. The reversal of 4221212 is 2121224.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 527648 + ... + 527655.

It is an arithmetic number, because the mean of its divisors is an integer number (1231188).

Almost surely, 2^4221212 is an apocalyptic number.

It is an amenable number.

4221212 is a deficient number, since it is larger than the sum of its proper divisors (3165916).

4221212 is a wasteful number, since it uses less digits than its factorization.

4221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055307 (or 1055305 counting only the distinct ones).

The product of its digits is 64, while the sum is 14.

The square root of 4221212 is about 2054.5588334239. The cubic root of 4221212 is about 161.6140280441.

Adding to 4221212 its reverse (2121224), we get a palindrome (6342436).

It can be divided in two parts, 42212 and 12, that added together give a palindrome (42224).

The spelling of 4221212 in words is "four million, two hundred twenty-one thousand, two hundred twelve".