12987135 has 56 divisors (see below), whose sum is σ = 26756640. Its totient is φ = 5925312.

The previous prime is 12987103. The next prime is 12987137. The reversal of 12987135 is 53178921.

It is not a de Polignac number, because 12987135 - 2⁵ = 12987103 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12987135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12987137) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 25261 + ... + 25769.

Almost surely, 2^12987135 is an apocalyptic number.

12987135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12987135 is an abundant number, since it is smaller than the sum of its proper divisors (13769505).

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

12987135 is an frugal number, since it uses more digits than its factorization.

12987135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539 (or 524 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 12987135 is about 3603.7667793574. The cubic root of 12987135 is about 235.0558792725.

The spelling of 12987135 in words is "twelve million, nine hundred eighty-seven thousand, one hundred thirty-five".