71271012 has 24 divisors (see below), whose sum is σ = 166924800. Its totient is φ = 23667616.

The previous prime is 71271001. The next prime is 71271017. The reversal of 71271012 is 21017217.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 71271012.

It is not an unprimeable number, because it can be changed into a prime (71271017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7812 + ... + 14267.

It is an arithmetic number, because the mean of its divisors is an integer number (6955200).

Almost surely, 2^71271012 is an apocalyptic number.

It is an amenable number.

71271012 is an abundant number, since it is smaller than the sum of its proper divisors (95653788).

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

71271012 is a wasteful number, since it uses less digits than its factorization.

71271012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22355 (or 22353 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 21.

The square root of 71271012 is about 8442.2160597796. The cubic root of 71271012 is about 414.6079657718.

Adding to 71271012 its reverse (21017217), we get a palindrome (92288229).

The spelling of 71271012 in words is "seventy-one million, two hundred seventy-one thousand, twelve".