2143081 has 2 divisors, whose sum is σ = 2143082. Its totient is φ = 2143080.

The previous prime is 2143073. The next prime is 2143087. The reversal of 2143081 is 1803412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2128681 + 14400 = 1459^2 + 120^2 .

It is a cyclic number.

It is not a de Polignac number, because 2143081 - 2³ = 2143073 is a prime.

It is a super-2 number, since 2×2143081² = 9185592345122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2143087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071540 + 1071541.

It is an arithmetic number, because the mean of its divisors is an integer number (1071541).

2^2143081 is an apocalyptic number.

It is an amenable number.

2143081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143081 is an equidigital number, since it uses as much as digits as its factorization.

2143081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 2143081 is about 1463.9265691967. The cubic root of 2143081 is about 128.9276881749.

Adding to 2143081 its reverse (1803412), we get a palindrome (3946493).

The spelling of 2143081 in words is "two million, one hundred forty-three thousand, eighty-one".