12864397 has 16 divisors (see below), whose sum is σ = 15917440. Its totient is φ = 10124352.

The previous prime is 12864389. The next prime is 12864403. The reversal of 12864397 is 79346821.

It is not a de Polignac number, because 12864397 - 2³ = 12864389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12864307) 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 15 ways as a sum of consecutive naturals, for example, 33754 + ... + 34132.

It is an arithmetic number, because the mean of its divisors is an integer number (994840).

Almost surely, 2^12864397 is an apocalyptic number.

It is an amenable number.

12864397 is a deficient number, since it is larger than the sum of its proper divisors (3053043).

12864397 is a wasteful number, since it uses less digits than its factorization.

12864397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772.

The product of its digits is 72576, while the sum is 40.

The square root of 12864397 is about 3586.6972272552. The cubic root of 12864397 is about 234.3130504597.

The spelling of 12864397 in words is "twelve million, eight hundred sixty-four thousand, three hundred ninety-seven".