1271571168 has 144 divisors (see below), whose sum is σ = 4111493904. Its totient is φ = 341913600.

The previous prime is 1271571137. The next prime is 1271571173. The reversal of 1271571168 is 8611751721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72018 + ... + 87918.

It is an arithmetic number, because the mean of its divisors is an integer number (28552041).

Almost surely, 2^1271571168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1271571168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2055746952).

1271571168 is an abundant number, since it is smaller than the sum of its proper divisors (2839922736).

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

1271571168 is a wasteful number, since it uses less digits than its factorization.

1271571168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15945 (or 15930 counting only the distinct ones).

The product of its digits is 23520, while the sum is 39.

The square root of 1271571168 is about 35659.0965673557. The cubic root of 1271571168 is about 1083.3785284077.

The spelling of 1271571168 in words is "one billion, two hundred seventy-one million, five hundred seventy-one thousand, one hundred sixty-eight".