1287056568 has 64 divisors (see below), whose sum is σ = 3737617920. Its totient is φ = 361699200.

The previous prime is 1287056557. The next prime is 1287056597. The reversal of 1287056568 is 8656507821.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52548 + ... + 73043.

It is an arithmetic number, because the mean of its divisors is an integer number (58400280).

Almost surely, 2^1287056568 is an apocalyptic number.

It is an amenable number.

1287056568 is an abundant number, since it is smaller than the sum of its proper divisors (2450561352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1287056568 is a wasteful number, since it uses less digits than its factorization.

1287056568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125668 (or 125664 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 48.

The square root of 1287056568 is about 35875.5706296081. The cubic root of 1287056568 is about 1087.7586487970.

The spelling of 1287056568 in words is "one billion, two hundred eighty-seven million, fifty-six thousand, five hundred sixty-eight".