1287485556 has 48 divisors (see below), whose sum is σ = 3435048960. Its totient is φ = 367665120.

The previous prime is 1287485527. The next prime is 1287485561. The reversal of 1287485556 is 6555847821.

It is a junction number, because it is equal to n+sod(n) for n = 1287485499 and 1287485508.

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, 326565 + ... + 330483.

It is an arithmetic number, because the mean of its divisors is an integer number (71563520).

Almost surely, 2^1287485556 is an apocalyptic number.

It is an amenable number.

1287485556 is an abundant number, since it is smaller than the sum of its proper divisors (2147563404).

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

1287485556 is a wasteful number, since it uses less digits than its factorization.

1287485556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7844 (or 7842 counting only the distinct ones).

The product of its digits is 2688000, while the sum is 51.

The square root of 1287485556 is about 35881.5489632206. The cubic root of 1287485556 is about 1087.8794887517.

The spelling of 1287485556 in words is "one billion, two hundred eighty-seven million, four hundred eighty-five thousand, five hundred fifty-six".