1221222 has 16 divisors (see below), whose sum is σ = 2508912. Its totient is φ = 396000.

The previous prime is 1221221. The next prime is 1221223. The reversal of 1221222 is 2221221.

It is an interprime number because it is at equal distance from previous prime (1221221) and next prime (1221223).

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

It is a junction number, because it is equal to n+sod(n) for n = 1221198 and 1221207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221221) 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, 2529 + ... + 2972.

It is an arithmetic number, because the mean of its divisors is an integer number (156807).

2^1221222 is an apocalyptic number.

1221222 is an abundant number, since it is smaller than the sum of its proper divisors (1287690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221222 is a wasteful number, since it uses less digits than its factorization.

1221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5543.

The product of its digits is 32, while the sum is 12.

The square root of 1221222 is about 1105.0891366763. The cubic root of 1221222 is about 106.8886371573. Note that the first 3 decimals are identical.

Adding to 1221222 its reverse (2221221), we get a palindrome (3442443).

Subtracting 1221222 from its reverse (2221221), we obtain a palindrome (999999).

The spelling of 1221222 in words is "one million, two hundred twenty-one thousand, two hundred twenty-two".