1171281988 has 12 divisors (see below), whose sum is σ = 2097412240. Its totient is φ = 572021352.

The previous prime is 1171281967. The next prime is 1171282001. The reversal of 1171281988 is 8891821711.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3404718 + ... + 3405061.

Almost surely, 2^1171281988 is an apocalyptic number.

It is an amenable number.

1171281988 is a deficient number, since it is larger than the sum of its proper divisors (926130252).

1171281988 is a wasteful number, since it uses less digits than its factorization.

1171281988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6809826 (or 6809824 counting only the distinct ones).

The product of its digits is 64512, while the sum is 46.

The square root of 1171281988 is about 34223.9972533893. The cubic root of 1171281988 is about 1054.1129649311.

The spelling of 1171281988 in words is "one billion, one hundred seventy-one million, two hundred eighty-one thousand, nine hundred eighty-eight".