1287875275 has 6 divisors (see below), whose sum is σ = 1596965372. Its totient is φ = 1030300200.

The previous prime is 1287875261. The next prime is 1287875291. The reversal of 1287875275 is 5725787821.

It is a de Polignac number, because none of the positive numbers 2^k-1287875275 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25757481 + ... + 25757530.

Almost surely, 2^1287875275 is an apocalyptic number.

1287875275 is a deficient number, since it is larger than the sum of its proper divisors (309090097).

1287875275 is an equidigital number, since it uses as much as digits as its factorization.

1287875275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51515021 (or 51515016 counting only the distinct ones).

The product of its digits is 2195200, while the sum is 52.

The square root of 1287875275 is about 35886.9791846569. The cubic root of 1287875275 is about 1087.9892439081.

The spelling of 1287875275 in words is "one billion, two hundred eighty-seven million, eight hundred seventy-five thousand, two hundred seventy-five".