2181141 has 8 divisors (see below), whose sum is σ = 3231360. Its totient is φ = 1454076.

The previous prime is 2181139. The next prime is 2181149. The reversal of 2181141 is 1411812.

It is not a de Polignac number, because 2181141 - 2¹ = 2181139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40365 + ... + 40418.

It is an arithmetic number, because the mean of its divisors is an integer number (403920).

2^2181141 is an apocalyptic number.

It is an amenable number.

2181141 is a deficient number, since it is larger than the sum of its proper divisors (1050219).

2181141 is an equidigital number, since it uses as much as digits as its factorization.

2181141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80792 (or 80786 counting only the distinct ones).

The product of its digits is 64, while the sum is 18.

The square root of 2181141 is about 1476.8686468336. The cubic root of 2181141 is about 129.6864435294.

Adding to 2181141 its reverse (1411812), we get a palindrome (3592953).

The spelling of 2181141 in words is "two million, one hundred eighty-one thousand, one hundred forty-one".