71243171 has 4 divisors (see below), whose sum is σ = 71787144. Its totient is φ = 70699200.

The previous prime is 71243119. The next prime is 71243173. The reversal of 71243171 is 17134217.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17134217 = 71 ⋅241327.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71243171 is a prime.

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 71243171.

It is not an unprimeable number, because it can be changed into a prime (71243173) 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, 271790 + ... + 272051.

It is an arithmetic number, because the mean of its divisors is an integer number (17946786).

Almost surely, 2^71243171 is an apocalyptic number.

71243171 is a deficient number, since it is larger than the sum of its proper divisors (543973).

71243171 is a wasteful number, since it uses less digits than its factorization.

71243171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543972.

The product of its digits is 1176, while the sum is 26.

The square root of 71243171 is about 8440.5669833252. The cubic root of 71243171 is about 414.5539718528.

Adding to 71243171 its reverse (17134217), we get a palindrome (88377388).

The spelling of 71243171 in words is "seventy-one million, two hundred forty-three thousand, one hundred seventy-one".