1121871687 has 16 divisors (see below), whose sum is σ = 1506032640. Its totient is φ = 742829472.

The previous prime is 1121871683. The next prime is 1121871689. The reversal of 1121871687 is 7861781211.

It is not a de Polignac number, because 1121871687 - 2² = 1121871683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121871683) 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, 316318 + ... + 319844.

It is an arithmetic number, because the mean of its divisors is an integer number (94127040).

Almost surely, 2^1121871687 is an apocalyptic number.

1121871687 is a deficient number, since it is larger than the sum of its proper divisors (384160953).

1121871687 is a wasteful number, since it uses less digits than its factorization.

1121871687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4222.

The product of its digits is 37632, while the sum is 42.

The square root of 1121871687 is about 33494.3530613744. The cubic root of 1121871687 is about 1039.0769938772.

The spelling of 1121871687 in words is "one billion, one hundred twenty-one million, eight hundred seventy-one thousand, six hundred eighty-seven".