71000871 has 4 divisors (see below), whose sum is σ = 94667832. Its totient is φ = 47333912.

The previous prime is 71000861. The next prime is 71000893. The reversal of 71000871 is 17800017.

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 71000871 - 2¹³ = 70992679 is a prime.

It is a super-2 number, since 2×71000871² = 10082247365517282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71000801) 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, 11833476 + ... + 11833481.

It is an arithmetic number, because the mean of its divisors is an integer number (23666958).

Almost surely, 2^71000871 is an apocalyptic number.

71000871 is a deficient number, since it is larger than the sum of its proper divisors (23666961).

71000871 is a wasteful number, since it uses less digits than its factorization.

71000871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23666960.

The product of its (nonzero) digits is 392, while the sum is 24.

The square root of 71000871 is about 8426.2014573591. The cubic root of 71000871 is about 414.0834681993.

Adding to 71000871 its reverse (17800017), we get a palindrome (88800888).

The spelling of 71000871 in words is "seventy-one million, eight hundred seventy-one", and thus it is an aban number.