2871787 has 4 divisors (see below), whose sum is σ = 2882656. Its totient is φ = 2860920.

The previous prime is 2871767. The next prime is 2871797. The reversal of 2871787 is 7871782.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2871787 - 2¹⁵ = 2839019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2871767) 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, 5028 + ... + 5569.

It is an arithmetic number, because the mean of its divisors is an integer number (720664).

2^2871787 is an apocalyptic number.

2871787 is a deficient number, since it is larger than the sum of its proper divisors (10869).

2871787 is a wasteful number, since it uses less digits than its factorization.

2871787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10868.

The product of its digits is 43904, while the sum is 40.

The square root of 2871787 is about 1694.6347689104. The cubic root of 2871787 is about 142.1403591341.

The spelling of 2871787 in words is "two million, eight hundred seventy-one thousand, seven hundred eighty-seven".