1811141 has 2 divisors, whose sum is σ = 1811142. Its totient is φ = 1811140.

The previous prime is 1811119. The next prime is 1811167. The reversal of 1811141 is 1411181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1809025 + 2116 = 1345^2 + 46^2 .

It is an emirp because it is prime and its reverse (1411181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1811141 - 2¹⁴ = 1794757 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1811041) 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, 905570 + 905571.

It is an arithmetic number, because the mean of its divisors is an integer number (905571).

2^1811141 is an apocalyptic number.

It is an amenable number.

1811141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1811141 is an equidigital number, since it uses as much as digits as its factorization.

1811141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32, while the sum is 17.

The square root of 1811141 is about 1345.7863872101. The cubic root of 1811141 is about 121.8944935727.

The spelling of 1811141 in words is "one million, eight hundred eleven thousand, one hundred forty-one".