2871161 has 4 divisors (see below), whose sum is σ = 2875812. Its totient is φ = 2866512.

The previous prime is 2871139. The next prime is 2871173. The reversal of 2871161 is 1611782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1611782 = 2 ⋅805891.

It can be written as a sum of positive squares in 2 ways, for example, as 2621161 + 250000 = 1619^2 + 500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2871161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2871161.

It is not an unprimeable number, because it can be changed into a prime (2871101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1226 + ... + 2691.

It is an arithmetic number, because the mean of its divisors is an integer number (718953).

2^2871161 is an apocalyptic number.

It is an amenable number.

2871161 is a deficient number, since it is larger than the sum of its proper divisors (4651).

2871161 is an equidigital number, since it uses as much as digits as its factorization.

2871161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4650.

The product of its digits is 672, while the sum is 26.

The square root of 2871161 is about 1694.4500582785. The cubic root of 2871161 is about 142.1300303353.

The spelling of 2871161 in words is "two million, eight hundred seventy-one thousand, one hundred sixty-one".