12987143 has 6 divisors (see below), whose sum is σ = 14063184. Its totient is φ = 11987976.

The previous prime is 12987137. The next prime is 12987151. The reversal of 12987143 is 34178921.

It is not a de Polignac number, because 12987143 - 2¹⁴ = 12970759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12987103) 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 5 ways as a sum of consecutive naturals, for example, 38255 + ... + 38592.

It is an arithmetic number, because the mean of its divisors is an integer number (2343864).

Almost surely, 2^12987143 is an apocalyptic number.

12987143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12987143 is a deficient number, since it is larger than the sum of its proper divisors (1076041).

12987143 is an equidigital number, since it uses as much as digits as its factorization.

12987143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76873 (or 76860 counting only the distinct ones).

The product of its digits is 12096, while the sum is 35.

The square root of 12987143 is about 3603.7678893070. The cubic root of 12987143 is about 235.0559275368.

The spelling of 12987143 in words is "twelve million, nine hundred eighty-seven thousand, one hundred forty-three".