870871 has 2 divisors, whose sum is σ = 870872. Its totient is φ = 870870.

The previous prime is 870853. The next prime is 870889. The reversal of 870871 is 178078.

It is a balanced prime because it is at equal distance from previous prime (870853) and next prime (870889).

It is a cyclic number.

It is not a de Polignac number, because 870871 - 2⁷ = 870743 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (870811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435435 + 435436.

It is an arithmetic number, because the mean of its divisors is an integer number (435436).

2⁸⁷⁰⁸⁷¹ is an apocalyptic number.

870871 is a deficient number, since it is larger than the sum of its proper divisors (1).

870871 is an equidigital number, since it uses as much as digits as its factorization.

870871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3136, while the sum is 31.

The square root of 870871 is about 933.2046935158. The cubic root of 870871 is about 95.4958743866.

The spelling of 870871 in words is "eight hundred seventy thousand, eight hundred seventy-one".