1171110987 has 16 divisors (see below), whose sum is σ = 1810414080. Its totient is φ = 746795016.

The previous prime is 1171110953. The next prime is 1171110989. The reversal of 1171110987 is 7890111711.

It is not a de Polignac number, because 1171110987 - 2¹⁰ = 1171109963 is a prime.

It is a super-2 number, since 2×1171110987² = 2743001887744228338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1171110989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 942303 + ... + 943544.

It is an arithmetic number, because the mean of its divisors is an integer number (113150880).

Almost surely, 2^1171110987 is an apocalyptic number.

1171110987 is a deficient number, since it is larger than the sum of its proper divisors (639303093).

1171110987 is a wasteful number, since it uses less digits than its factorization.

1171110987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1885879 (or 1885873 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 36.

The square root of 1171110987 is about 34221.4989005450. The cubic root of 1171110987 is about 1054.0616641211.

The spelling of 1171110987 in words is "one billion, one hundred seventy-one million, one hundred ten thousand, nine hundred eighty-seven".