71271172 has 24 divisors (see below), whose sum is σ = 142856000. Its totient is φ = 30477600.

The previous prime is 71271163. The next prime is 71271197. The reversal of 71271172 is 27117217.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 71271172.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11422 + ... + 16522.

Almost surely, 2^71271172 is an apocalyptic number.

It is an amenable number.

71271172 is an abundant number, since it is smaller than the sum of its proper divisors (71584828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71271172 is a wasteful number, since it uses less digits than its factorization.

71271172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5611 (or 5609 counting only the distinct ones).

The product of its digits is 1372, while the sum is 28.

The square root of 71271172 is about 8442.2255359591. The cubic root of 71271172 is about 414.6082760299.

Adding to 71271172 its reverse (27117217), we get a palindrome (98388389).

The spelling of 71271172 in words is "seventy-one million, two hundred seventy-one thousand, one hundred seventy-two".