1287150915 has 24 divisors (see below), whose sum is σ = 2173547088. Its totient is φ = 650347200.

The previous prime is 1287150913. The next prime is 1287150929. The reversal of 1287150915 is 5190517821.

It is not a de Polignac number, because 1287150915 - 2¹ = 1287150913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1287150913) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113436 + ... + 124265.

It is an arithmetic number, because the mean of its divisors is an integer number (90564462).

Almost surely, 2^1287150915 is an apocalyptic number.

1287150915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1287150915 is a deficient number, since it is larger than the sum of its proper divisors (886396173).

1287150915 is a wasteful number, since it uses less digits than its factorization.

1287150915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237747 (or 237728 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 39.

The square root of 1287150915 is about 35876.8855253630. The cubic root of 1287150915 is about 1087.7852273381.

The spelling of 1287150915 in words is "one billion, two hundred eighty-seven million, one hundred fifty thousand, nine hundred fifteen".