71071271 has 4 divisors (see below), whose sum is σ = 75251952. Its totient is φ = 66890592.

The previous prime is 71071261. The next prime is 71071277. The reversal of 71071271 is 17217017.

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 71071271 - 2⁶ = 71071207 is a prime.

It is a super-2 number, since 2×71071271² = 10102251123110882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71071271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71071277) 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, 2090315 + ... + 2090348.

It is an arithmetic number, because the mean of its divisors is an integer number (18812988).

Almost surely, 2^71071271 is an apocalyptic number.

71071271 is a deficient number, since it is larger than the sum of its proper divisors (4180681).

71071271 is a wasteful number, since it uses less digits than its factorization.

71071271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4180680.

The product of its (nonzero) digits is 686, while the sum is 26.

The square root of 71071271 is about 8430.3778681623. The cubic root of 71071271 is about 414.2202827019.

Adding to 71071271 its reverse (17217017), we get a palindrome (88288288).

The spelling of 71071271 in words is "seventy-one million, seventy-one thousand, two hundred seventy-one".