1271115136 has 16 divisors (see below), whose sum is σ = 2532299940. Its totient is φ = 635557504.

The previous prime is 1271115127. The next prime is 1271115221. The reversal of 1271115136 is 6315111721.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4965166 + ... + 4965421.

Almost surely, 2^1271115136 is an apocalyptic number.

1271115136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1271115136 is a deficient number, since it is larger than the sum of its proper divisors (1261184804).

1271115136 is an frugal number, since it uses more digits than its factorization.

1271115136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9930601 (or 9930589 counting only the distinct ones).

The product of its digits is 1260, while the sum is 28.

The square root of 1271115136 is about 35652.7016648108. The cubic root of 1271115136 is about 1083.2489998467.

Adding to 1271115136 its reverse (6315111721), we get a palindrome (7586226857).

The spelling of 1271115136 in words is "one billion, two hundred seventy-one million, one hundred fifteen thousand, one hundred thirty-six".