1000871 has 4 divisors (see below), whose sum is σ = 1003200. Its totient is φ = 998544.

The previous prime is 1000861. The next prime is 1000889. The reversal of 1000871 is 1780001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000871 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 (1000861) 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, 311 + ... + 1448.

It is an arithmetic number, because the mean of its divisors is an integer number (250800).

2^1000871 is an apocalyptic number.

1000871 is a deficient number, since it is larger than the sum of its proper divisors (2329).

1000871 is an equidigital number, since it uses as much as digits as its factorization.

1000871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2328.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 1000871 is about 1000.4354052112. The cubic root of 1000871 is about 100.0290249081.

Adding to 1000871 its reverse (1780001), we get a palindrome (2780872).

The spelling of 1000871 in words is "one million, eight hundred seventy-one", and thus it is an aban number.