2859871 has 4 divisors (see below), whose sum is σ = 3268432. Its totient is φ = 2451312.

The previous prime is 2859869. The next prime is 2859877. The reversal of 2859871 is 1789582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1789582 = 2 ⋅894791.

It is a cyclic number.

It is not a de Polignac number, because 2859871 - 2¹ = 2859869 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 (2859877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204270 + ... + 204283.

It is an arithmetic number, because the mean of its divisors is an integer number (817108).

2^2859871 is an apocalyptic number.

2859871 is a deficient number, since it is larger than the sum of its proper divisors (408561).

2859871 is an equidigital number, since it uses as much as digits as its factorization.

2859871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408560.

The product of its digits is 40320, while the sum is 40.

The square root of 2859871 is about 1691.1153124492. The cubic root of 2859871 is about 141.9434907068.

The spelling of 2859871 in words is "two million, eight hundred fifty-nine thousand, eight hundred seventy-one".