2785871 has 8 divisors (see below), whose sum is σ = 3051264. Its totient is φ = 2522520.

The previous prime is 2785859. The next prime is 2785873. The reversal of 2785871 is 1785872.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2785871 - 2¹⁸ = 2523727 is a prime.

It is a super-2 number, since 2×2785871² = 15522154457282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2785873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4820 + ... + 5366.

It is an arithmetic number, because the mean of its divisors is an integer number (381408).

2^2785871 is an apocalyptic number.

2785871 is a deficient number, since it is larger than the sum of its proper divisors (265393).

2785871 is a wasteful number, since it uses less digits than its factorization.

2785871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021.

The product of its digits is 31360, while the sum is 38.

The square root of 2785871 is about 1669.0928673983. The cubic root of 2785871 is about 140.7085002695.

Subtracting from 2785871 its reverse (1785872), we obtain a palindrome (999999).

The spelling of 2785871 in words is "two million, seven hundred eighty-five thousand, eight hundred seventy-one".