1287140632 has 16 divisors (see below), whose sum is σ = 2414051640. Its totient is φ = 643393536.

The previous prime is 1287140623. The next prime is 1287140639. The reversal of 1287140632 is 2360417821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287140639) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 11928 + ... + 52120.

Almost surely, 2^1287140632 is an apocalyptic number.

It is an amenable number.

1287140632 is a deficient number, since it is larger than the sum of its proper divisors (1126911008).

1287140632 is a wasteful number, since it uses less digits than its factorization.

1287140632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44202 (or 44198 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 1287140632 is about 35876.7422155357. The cubic root of 1287140632 is about 1087.7823305721.

The spelling of 1287140632 in words is "one billion, two hundred eighty-seven million, one hundred forty thousand, six hundred thirty-two".