2871811 has 2 divisors, whose sum is σ = 2871812. Its totient is φ = 2871810.

The previous prime is 2871797. The next prime is 2871833. The reversal of 2871811 is 1181782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2871811 - 2¹⁷ = 2740739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2871811.

It is not a weakly prime, because it can be changed into another prime (2871881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1435905 + 1435906.

It is an arithmetic number, because the mean of its divisors is an integer number (1435906).

2^2871811 is an apocalyptic number.

2871811 is a deficient number, since it is larger than the sum of its proper divisors (1).

2871811 is an equidigital number, since it uses as much as digits as its factorization.

2871811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 896, while the sum is 28.

The square root of 2871811 is about 1694.6418500674. The cubic root of 2871811 is about 142.1407550966.

The spelling of 2871811 in words is "two million, eight hundred seventy-one thousand, eight hundred eleven".