1287930025 has 12 divisors (see below), whose sum is σ = 1612541632. Its totient is φ = 1020338640.

The previous prime is 1287929971. The next prime is 1287930041. The reversal of 1287930025 is 5200397821.

It is not a de Polignac number, because 1287930025 - 2⁷ = 1287929897 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 247509 + ... + 252658.

Almost surely, 2^1287930025 is an apocalyptic number.

It is an amenable number.

1287930025 is a deficient number, since it is larger than the sum of its proper divisors (324611607).

1287930025 is a wasteful number, since it uses less digits than its factorization.

1287930025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500280 (or 500275 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 1287930025 is about 35887.7419880382. The cubic root of 1287930025 is about 1088.0046611793.

It can be divided in two parts, 128 and 7930025, that added together give a triangular number (7930153 = T₃₉₈₂).

The spelling of 1287930025 in words is "one billion, two hundred eighty-seven million, nine hundred thirty thousand, twenty-five".