1287785415 has 48 divisors (see below), whose sum is σ = 2474219520. Its totient is φ = 569701440.

The previous prime is 1287785381. The next prime is 1287785459. The reversal of 1287785415 is 5145877821.

It is not a de Polignac number, because 1287785415 - 2⁶ = 1287785351 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5475 + ... + 51044.

It is an arithmetic number, because the mean of its divisors is an integer number (51546240).

Almost surely, 2^1287785415 is an apocalyptic number.

1287785415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1287785415 is a deficient number, since it is larger than the sum of its proper divisors (1186434105).

1287785415 is a wasteful number, since it uses less digits than its factorization.

1287785415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56572 (or 56565 counting only the distinct ones).

The product of its digits is 627200, while the sum is 48.

The square root of 1287785415 is about 35885.7271766924. The cubic root of 1287785415 is about 1087.9639389247.

The spelling of 1287785415 in words is "one billion, two hundred eighty-seven million, seven hundred eighty-five thousand, four hundred fifteen".