1091222 has 16 divisors (see below), whose sum is σ = 1801872. Its totient is φ = 491520.

The previous prime is 1091221. The next prime is 1091239. The reversal of 1091222 is 2221901.

It is a self number, because there is not a number n which added to its sum of digits gives 1091222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091221) 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, 4118 + ... + 4374.

It is an arithmetic number, because the mean of its divisors is an integer number (112617).

2^1091222 is an apocalyptic number.

1091222 is a deficient number, since it is larger than the sum of its proper divisors (710650).

1091222 is a wasteful number, since it uses less digits than its factorization.

1091222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1091222 is about 1044.6157188172. The cubic root of 1091222 is about 102.9526913794.

It can be divided in two parts, 109 and 1222, that added together give a palindrome (1331).

The spelling of 1091222 in words is "one million, ninety-one thousand, two hundred twenty-two".