1287925875 has 24 divisors (see below), whose sum is σ = 2321703072. Its totient is φ = 686893200.

The previous prime is 1287925843. The next prime is 1287925883. The reversal of 1287925875 is 5785297821.

It is not a de Polignac number, because 1287925875 - 2⁵ = 1287925843 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 571287 + ... + 573536.

It is an arithmetic number, because the mean of its divisors is an integer number (96737628).

Almost surely, 2^1287925875 is an apocalyptic number.

1287925875 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1287925875 is a deficient number, since it is larger than the sum of its proper divisors (1033777197).

1287925875 is a wasteful number, since it uses less digits than its factorization.

1287925875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144844 (or 1144831 counting only the distinct ones).

The product of its digits is 2822400, while the sum is 54.

The square root of 1287925875 is about 35887.6841688064. The cubic root of 1287925875 is about 1088.0034925795.

The spelling of 1287925875 in words is "one billion, two hundred eighty-seven million, nine hundred twenty-five thousand, eight hundred seventy-five".