1122181 has 2 divisors, whose sum is σ = 1122182. Its totient is φ = 1122180.

The previous prime is 1122179. The next prime is 1122227. The reversal of 1122181 is 1812211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 919681 + 202500 = 959^2 + 450^2 .

It is a cyclic number.

It is not a de Polignac number, because 1122181 - 2¹ = 1122179 is a prime.

It is a super-2 number, since 2×1122181² = 2518580393522, which contains 22 as substring.

Together with 1122179, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1122131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561090 + 561091.

It is an arithmetic number, because the mean of its divisors is an integer number (561091).

2^1122181 is an apocalyptic number.

It is an amenable number.

1122181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122181 is an equidigital number, since it uses as much as digits as its factorization.

1122181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32, while the sum is 16.

The square root of 1122181 is about 1059.3304489157. The cubic root of 1122181 is about 103.9172480284.

Adding to 1122181 its reverse (1812211), we get a palindrome (2934392).

The spelling of 1122181 in words is "one million, one hundred twenty-two thousand, one hundred eighty-one".