2871687 has 32 divisors (see below), whose sum is σ = 4813312. Its totient is φ = 1482624.

The previous prime is 2871643. The next prime is 2871689. The reversal of 2871687 is 7861782.

It is not a de Polignac number, because 2871687 - 2¹⁰ = 2870663 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2871689) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18213 + ... + 18369.

It is an arithmetic number, because the mean of its divisors is an integer number (150416).

2^2871687 is an apocalyptic number.

2871687 is a deficient number, since it is larger than the sum of its proper divisors (1941625).

2871687 is a wasteful number, since it uses less digits than its factorization.

2871687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247.

The product of its digits is 37632, while the sum is 39.

The square root of 2871687 is about 1694.6052637709. The cubic root of 2871687 is about 142.1387092670.

The spelling of 2871687 in words is "two million, eight hundred seventy-one thousand, six hundred eighty-seven".