71142871 has 2 divisors, whose sum is σ = 71142872. Its totient is φ = 71142870.

The previous prime is 71142857. The next prime is 71142889. The reversal of 71142871 is 17824117.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71142871 - 2²¹ = 69045719 is a prime.

It is a super-2 number, since 2×71142871² = 10122616188245282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71140871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35571435 + 35571436.

It is an arithmetic number, because the mean of its divisors is an integer number (35571436).

Almost surely, 2^71142871 is an apocalyptic number.

71142871 is a deficient number, since it is larger than the sum of its proper divisors (1).

71142871 is an equidigital number, since it uses as much as digits as its factorization.

71142871 is an evil number, because the sum of its binary digits is even.

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

The square root of 71142871 is about 8434.6233466587. The cubic root of 71142871 is about 414.3593366299.

Adding to 71142871 its reverse (17824117), we get a palindrome (88966988).

The spelling of 71142871 in words is "seventy-one million, one hundred forty-two thousand, eight hundred seventy-one".