1287171108 has 24 divisors (see below), whose sum is σ = 3337110560. Its totient is φ = 429057000.

The previous prime is 1287171101. The next prime is 1287171143. The reversal of 1287171108 is 8011717821.

It is a super-2 number, since 2×1287171108² = 3313618922539895328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1287171101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5959018 + ... + 5959233.

Almost surely, 2^1287171108 is an apocalyptic number.

1287171108 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1287171108 is an abundant number, since it is smaller than the sum of its proper divisors (2049939452).

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

1287171108 is a wasteful number, since it uses less digits than its factorization.

1287171108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11918264 (or 11918256 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 36.

The square root of 1287171108 is about 35877.1669450084. The cubic root of 1287171108 is about 1087.7909157496.

Adding to 1287171108 its reverse (8011717821), we get a palindrome (9298888929).

The spelling of 1287171108 in words is "one billion, two hundred eighty-seven million, one hundred seventy-one thousand, one hundred eight".