1271916208 has 20 divisors (see below), whose sum is σ = 2501120920. Its totient is φ = 626465664.

The previous prime is 1271916193. The next prime is 1271916211. The reversal of 1271916208 is 8026191721.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 592173 + ... + 594316.

It is an arithmetic number, because the mean of its divisors is an integer number (125056046).

Almost surely, 2^1271916208 is an apocalyptic number.

It is an amenable number.

1271916208 is a deficient number, since it is larger than the sum of its proper divisors (1229204712).

1271916208 is a wasteful number, since it uses less digits than its factorization.

1271916208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1186564 (or 1186558 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 1271916208 is about 35663.9342753993. The cubic root of 1271916208 is about 1083.4765108961.

The spelling of 1271916208 in words is "one billion, two hundred seventy-one million, nine hundred sixteen thousand, two hundred eight".