1122091 has 2 divisors, whose sum is σ = 1122092. Its totient is φ = 1122090.

The previous prime is 1122089. The next prime is 1122103. The reversal of 1122091 is 1902211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1122091 - 2¹ = 1122089 is a prime.

Together with 1122089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1122001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561045 + 561046.

It is an arithmetic number, because the mean of its divisors is an integer number (561046).

2^1122091 is an apocalyptic number.

1122091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122091 is an equidigital number, since it uses as much as digits as its factorization.

1122091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 1122091 is about 1059.2879684014. The cubic root of 1122091 is about 103.9144698662.

It can be divided in two parts, 11220 and 91, that added together give a palindrome (11311).

The spelling of 1122091 in words is "one million, one hundred twenty-two thousand, ninety-one".