12787312 has 20 divisors (see below), whose sum is σ = 25076520. Its totient is φ = 6315968.

The previous prime is 12787301. The next prime is 12787319. The reversal of 12787312 is 21378721.

It is a zygodrome in base 2 and base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12787319) 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 3 ways as a sum of consecutive naturals, for example, 3487 + ... + 6142.

It is an arithmetic number, because the mean of its divisors is an integer number (1253826).

Almost surely, 2^12787312 is an apocalyptic number.

It is an amenable number.

12787312 is a deficient number, since it is larger than the sum of its proper divisors (12289208).

12787312 is an equidigital number, since it uses as much as digits as its factorization.

12787312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9720 (or 9714 counting only the distinct ones).

The product of its digits is 4704, while the sum is 31.

The square root of 12787312 is about 3575.9351224540. The cubic root of 12787312 is about 233.8441019690.

The spelling of 12787312 in words is "twelve million, seven hundred eighty-seven thousand, three hundred twelve".