1287980612 has 12 divisors (see below), whose sum is σ = 2285712576. Its totient is φ = 634919880.

The previous prime is 1287980609. The next prime is 1287980627. The reversal of 1287980612 is 2160897821.

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 3 ways as a sum of consecutive naturals, for example, 2267288 + ... + 2267855.

It is an arithmetic number, because the mean of its divisors is an integer number (190476048).

Almost surely, 2^1287980612 is an apocalyptic number.

It is an amenable number.

1287980612 is a deficient number, since it is larger than the sum of its proper divisors (997731964).

1287980612 is a wasteful number, since it uses less digits than its factorization.

1287980612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4535218 (or 4535216 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 1287980612 is about 35888.4467760866. The cubic root of 1287980612 is about 1088.0189057863.

The spelling of 1287980612 in words is "one billion, two hundred eighty-seven million, nine hundred eighty thousand, six hundred twelve".