1287230872 has 8 divisors (see below), whose sum is σ = 2413557900. Its totient is φ = 643615432.

The previous prime is 1287230869. The next prime is 1287230873. The reversal of 1287230872 is 2780327821.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287230873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80451922 + ... + 80451937.

Almost surely, 2^1287230872 is an apocalyptic number.

It is an amenable number.

1287230872 is a deficient number, since it is larger than the sum of its proper divisors (1126327028).

1287230872 is a wasteful number, since it uses less digits than its factorization.

1287230872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160903865 (or 160903861 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 1287230872 is about 35877.9998327666. Note that the first 3 decimals coincide. The cubic root of 1287230872 is about 1087.8077510483.

The spelling of 1287230872 in words is "one billion, two hundred eighty-seven million, two hundred thirty thousand, eight hundred seventy-two".