1222188 has 48 divisors (see below), whose sum is σ = 3193344. Its totient is φ = 360640.

The previous prime is 1222187. The next prime is 1222219. The reversal of 1222188 is 8812221.

It is not an unprimeable number, because it can be changed into a prime (1222187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6106 + ... + 6302.

It is an arithmetic number, because the mean of its divisors is an integer number (66528).

2^1222188 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1596672).

1222188 is an abundant number, since it is smaller than the sum of its proper divisors (1971156).

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

1222188 is a wasteful number, since it uses less digits than its factorization.

1222188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 260 counting only the distinct ones).

The product of its digits is 512, while the sum is 24.

The square root of 1222188 is about 1105.5261190944. The cubic root of 1222188 is about 106.9168130910.

It can be divided in two parts, 12 and 22188, that multiplied together give a square (266256 = 516²).

The spelling of 1222188 in words is "one million, two hundred twenty-two thousand, one hundred eighty-eight".