2782871 has 16 divisors (see below), whose sum is σ = 3495744. Its totient is φ = 2156544.

The previous prime is 2782861. The next prime is 2782877. The reversal of 2782871 is 1782872.

It is not a de Polignac number, because 2782871 - 2¹⁴ = 2766487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2782877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4535 + ... + 5111.

It is an arithmetic number, because the mean of its divisors is an integer number (218484).

2^2782871 is an apocalyptic number.

2782871 is a deficient number, since it is larger than the sum of its proper divisors (712873).

2782871 is a wasteful number, since it uses less digits than its factorization.

2782871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650.

The product of its digits is 12544, while the sum is 35.

The square root of 2782871 is about 1668.1939335701. The cubic root of 2782871 is about 140.6579742263.

Subtracting from 2782871 its reverse (1782872), we obtain a palindrome (999999).

The spelling of 2782871 in words is "two million, seven hundred eighty-two thousand, eight hundred seventy-one".