1171391268 has 24 divisors (see below), whose sum is σ = 2877101920. Its totient is φ = 369912960.

The previous prime is 1171391257. The next prime is 1171391269. The reversal of 1171391268 is 8621931711.

It is not an unprimeable number, because it can be changed into a prime (1171391269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2568613 + ... + 2569068.

Almost surely, 2^1171391268 is an apocalyptic number.

It is an amenable number.

1171391268 is an abundant number, since it is smaller than the sum of its proper divisors (1705710652).

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

1171391268 is a wasteful number, since it uses less digits than its factorization.

1171391268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5137707 (or 5137705 counting only the distinct ones).

The product of its digits is 18144, while the sum is 39.

The square root of 1171391268 is about 34225.5937567195. The cubic root of 1171391268 is about 1054.1457466419.

The spelling of 1171391268 in words is "one billion, one hundred seventy-one million, three hundred ninety-one thousand, two hundred sixty-eight".