12864513 has 4 divisors (see below), whose sum is σ = 17152688. Its totient is φ = 8576340.

The previous prime is 12864499. The next prime is 12864517. The reversal of 12864513 is 31546821.

12864513 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12864513 - 2¹³ = 12856321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12864517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2144083 + ... + 2144088.

It is an arithmetic number, because the mean of its divisors is an integer number (4288172).

Almost surely, 2^12864513 is an apocalyptic number.

It is an amenable number.

12864513 is a deficient number, since it is larger than the sum of its proper divisors (4288175).

12864513 is an equidigital number, since it uses as much as digits as its factorization.

12864513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4288174.

The product of its digits is 5760, while the sum is 30.

The square root of 12864513 is about 3586.7133980847. The cubic root of 12864513 is about 234.3137547350.

The spelling of 12864513 in words is "twelve million, eight hundred sixty-four thousand, five hundred thirteen".