70871 has 4 divisors (see below), whose sum is σ = 71544. Its totient is φ = 70200.

The previous prime is 70867. The next prime is 70877. The reversal of 70871 is 17807.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 70871 - 2² = 70867 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 (70877) 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, 140 + ... + 401.

It is an arithmetic number, because the mean of its divisors is an integer number (17886).

2⁷⁰⁸⁷¹ is an apocalyptic number.

70871 is a deficient number, since it is larger than the sum of its proper divisors (673).

70871 is a wasteful number, since it uses less digits than its factorization.

70871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672.

The product of its (nonzero) digits is 392, while the sum is 23.

The square root of 70871 is about 266.2160776512. The cubic root of 70871 is about 41.3830840987.

The spelling of 70871 in words is "seventy thousand, eight hundred seventy-one".