2161141 has 2 divisors, whose sum is σ = 2161142. Its totient is φ = 2161140.

The previous prime is 2161129. The next prime is 2161157. The reversal of 2161141 is 1411612.

It is an a-pointer prime, because the next prime (2161157) can be obtained adding 2161141 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2090916 + 70225 = 1446^2 + 265^2 .

It is a cyclic number.

It is not a de Polignac number, because 2161141 - 2⁹ = 2160629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2161121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080570 + 1080571.

It is an arithmetic number, because the mean of its divisors is an integer number (1080571).

2^2161141 is an apocalyptic number.

It is an amenable number.

2161141 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161141 is an equidigital number, since it uses as much as digits as its factorization.

2161141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48, while the sum is 16.

The square root of 2161141 is about 1470.0819705037. The cubic root of 2161141 is about 129.2888385988.

Adding to 2161141 its reverse (1411612), we get a palindrome (3572753).

The spelling of 2161141 in words is "two million, one hundred sixty-one thousand, one hundred forty-one".