12864287 has 4 divisors (see below), whose sum is σ = 13279296. Its totient is φ = 12449280.

The previous prime is 12864263. The next prime is 12864307. The reversal of 12864287 is 78246821.

12864287 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12864287 - 2⁸ = 12864031 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12864287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12864217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207458 + ... + 207519.

It is an arithmetic number, because the mean of its divisors is an integer number (3319824).

Almost surely, 2^12864287 is an apocalyptic number.

12864287 is a deficient number, since it is larger than the sum of its proper divisors (415009).

12864287 is an equidigital number, since it uses as much as digits as its factorization.

12864287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415008.

The product of its digits is 43008, while the sum is 38.

The square root of 12864287 is about 3586.6818927806. The cubic root of 12864287 is about 234.3123826085.

The spelling of 12864287 in words is "twelve million, eight hundred sixty-four thousand, two hundred eighty-seven".