12864817 has 4 divisors (see below), whose sum is σ = 14702656. Its totient is φ = 11026980.

The previous prime is 12864791. The next prime is 12864823. The reversal of 12864817 is 71846821.

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, and also an emirpimes, since its reverse is a distinct semiprime: 71846821 = 127 ⋅565723.

It is a cyclic number.

It is not a de Polignac number, because 12864817 - 2¹¹ = 12862769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12864827) 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, 918909 + ... + 918922.

It is an arithmetic number, because the mean of its divisors is an integer number (3675664).

Almost surely, 2^12864817 is an apocalyptic number.

It is an amenable number.

12864817 is a deficient number, since it is larger than the sum of its proper divisors (1837839).

12864817 is an equidigital number, since it uses as much as digits as its factorization.

12864817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1837838.

The product of its digits is 21504, while the sum is 37.

The square root of 12864817 is about 3586.7557764643. The cubic root of 12864817 is about 234.3156004020.

The spelling of 12864817 in words is "twelve million, eight hundred sixty-four thousand, eight hundred seventeen".