2873861 has 4 divisors (see below), whose sum is σ = 2877324. Its totient is φ = 2870400.

The previous prime is 2873851. The next prime is 2873863. The reversal of 2873861 is 1683782.

2873861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1196836 + 1677025 = 1094^2 + 1295^2 .

It is a cyclic number.

It is not a de Polignac number, because 2873861 - 2⁶ = 2873797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2873863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 341 + ... + 2421.

It is an arithmetic number, because the mean of its divisors is an integer number (719331).

2^2873861 is an apocalyptic number.

It is an amenable number.

2873861 is a deficient number, since it is larger than the sum of its proper divisors (3463).

2873861 is a wasteful number, since it uses less digits than its factorization.

2873861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3462.

The product of its digits is 16128, while the sum is 35.

The square root of 2873861 is about 1695.2465897326. The cubic root of 2873861 is about 142.1745687471.

The spelling of 2873861 in words is "two million, eight hundred seventy-three thousand, eight hundred sixty-one".