2784871 has 2 divisors, whose sum is σ = 2784872. Its totient is φ = 2784870.

The previous prime is 2784857. The next prime is 2784883. The reversal of 2784871 is 1784872.

2784871 is nontrivially palindromic in base 6.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2784871 - 2⁹ = 2784359 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2784871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2784071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1392435 + 1392436.

It is an arithmetic number, because the mean of its divisors is an integer number (1392436).

2^2784871 is an apocalyptic number.

2784871 is a deficient number, since it is larger than the sum of its proper divisors (1).

2784871 is an equidigital number, since it uses as much as digits as its factorization.

2784871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25088, while the sum is 37.

The square root of 2784871 is about 1668.7932765924. The cubic root of 2784871 is about 140.6916622872.

Subtracting from 2784871 its reverse (1784872), we obtain a palindrome (999999).

It can be divided in two parts, 2784 and 871, that added together give a triangular number (3655 = T₈₅).

The spelling of 2784871 in words is "two million, seven hundred eighty-four thousand, eight hundred seventy-one".