871001 has 2 divisors, whose sum is σ = 871002. Its totient is φ = 871000.

The previous prime is 870997. The next prime is 871021. The reversal of 871001 is 100178.

871001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 855625 + 15376 = 925^2 + 124^2 .

It is a cyclic number.

It is not a de Polignac number, because 871001 - 2² = 870997 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (871021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435500 + 435501.

It is an arithmetic number, because the mean of its divisors is an integer number (435501).

2⁸⁷¹⁰⁰¹ is an apocalyptic number.

It is an amenable number.

871001 is a deficient number, since it is larger than the sum of its proper divisors (1).

871001 is an equidigital number, since it uses as much as digits as its factorization.

871001 is an evil number, because the sum of its binary digits is even.

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

The square root of 871001 is about 933.2743433739. The cubic root of 871001 is about 95.5006258925.

Adding to 871001 its reverse (100178), we get a palindrome (971179).

The spelling of 871001 in words is "eight hundred seventy-one thousand, one".