1321222 has 16 divisors (see below), whose sum is σ = 2384640. Its totient is φ = 536328.

The previous prime is 1321219. The next prime is 1321247. The reversal of 1321222 is 2221231.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2218 + ... + 2749.

It is an arithmetic number, because the mean of its divisors is an integer number (149040).

2^1321222 is an apocalyptic number.

1321222 is a deficient number, since it is larger than the sum of its proper divisors (1063418).

1321222 is a wasteful number, since it uses less digits than its factorization.

1321222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4995.

The product of its digits is 48, while the sum is 13.

The square root of 1321222 is about 1149.4442135223. Note that the first 3 decimals coincide. The cubic root of 1321222 is about 109.7299712830.

Adding to 1321222 its reverse (2221231), we get a palindrome (3542453).

Subtracting 1321222 from its reverse (2221231), we obtain a palindrome (900009).

The spelling of 1321222 in words is "one million, three hundred twenty-one thousand, two hundred twenty-two".