2856871 has 2 divisors, whose sum is σ = 2856872. Its totient is φ = 2856870.

The previous prime is 2856863. The next prime is 2856883. The reversal of 2856871 is 1786582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2856871 - 2³ = 2856863 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2856871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2850871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1428435 + 1428436.

It is an arithmetic number, because the mean of its divisors is an integer number (1428436).

2^2856871 is an apocalyptic number.

2856871 is a deficient number, since it is larger than the sum of its proper divisors (1).

2856871 is an equidigital number, since it uses as much as digits as its factorization.

2856871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 37.

The square root of 2856871 is about 1690.2280911167. The cubic root of 2856871 is about 141.8938405119.

The spelling of 2856871 in words is "two million, eight hundred fifty-six thousand, eight hundred seventy-one".