4021222 has 4 divisors (see below), whose sum is σ = 6031836. Its totient is φ = 2010610.

The previous prime is 4021211. The next prime is 4021229. The reversal of 4021222 is 2221204.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005304 + ... + 1005307.

It is an arithmetic number, because the mean of its divisors is an integer number (1507959).

Almost surely, 2^4021222 is an apocalyptic number.

4021222 is a deficient number, since it is larger than the sum of its proper divisors (2010614).

4021222 is a wasteful number, since it uses less digits than its factorization.

4021222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010613.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 4021222 is about 2005.2984815234. The cubic root of 4021222 is about 159.0203420567.

Adding to 4021222 its reverse (2221204), we get a palindrome (6242426).

The spelling of 4021222 in words is "four million, twenty-one thousand, two hundred twenty-two".