1271875128 has 48 divisors (see below), whose sum is σ = 3377749080. Its totient is φ = 399017472.

The previous prime is 1271875103. The next prime is 1271875133. The reversal of 1271875128 is 8215781721.

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 1271875128.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84751 + ... + 98622.

Almost surely, 2^1271875128 is an apocalyptic number.

It is an amenable number.

1271875128 is an abundant number, since it is smaller than the sum of its proper divisors (2105873952).

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

1271875128 is a wasteful number, since it uses less digits than its factorization.

1271875128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183416 (or 183395 counting only the distinct ones).

The product of its digits is 62720, while the sum is 42.

The square root of 1271875128 is about 35663.3583387768. The cubic root of 1271875128 is about 1083.4648461617.

The spelling of 1271875128 in words is "one billion, two hundred seventy-one million, eight hundred seventy-five thousand, one hundred twenty-eight".