12987500 has 36 divisors (see below), whose sum is σ = 28435680. Its totient is φ = 5190000.

The previous prime is 12987497. The next prime is 12987509. The reversal of 12987500 is 578921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12987509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11981 + ... + 13019.

It is an arithmetic number, because the mean of its divisors is an integer number (789880).

Almost surely, 2^12987500 is an apocalyptic number.

12987500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12987500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14217840).

12987500 is an abundant number, since it is smaller than the sum of its proper divisors (15448180).

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

12987500 is an equidigital number, since it uses as much as digits as its factorization.

12987500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068 (or 1046 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 12987500 is about 3603.8174204585. The cubic root of 12987500 is about 235.0580813130.

The spelling of 12987500 in words is "twelve million, nine hundred eighty-seven thousand, five hundred".