12864637 has 4 divisors (see below), whose sum is σ = 13107420. Its totient is φ = 12621856.

The previous prime is 12864623. The next prime is 12864667. The reversal of 12864637 is 73646821.

12864637 is digitally balanced in base 2, 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 an emirpimes, since its reverse is a distinct semiprime: 73646821 = 277 ⋅265873.

It can be written as a sum of positive squares in 2 ways, for example, as 7431076 + 5433561 = 2726^2 + 2331^2 .

It is a cyclic number.

It is not a de Polignac number, because 12864637 - 2¹⁵ = 12831869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12864596 and 12864605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12864617) 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, 121312 + ... + 121417.

It is an arithmetic number, because the mean of its divisors is an integer number (3276855).

Almost surely, 2^12864637 is an apocalyptic number.

It is an amenable number.

12864637 is a deficient number, since it is larger than the sum of its proper divisors (242783).

12864637 is an equidigital number, since it uses as much as digits as its factorization.

12864637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242782.

The product of its digits is 48384, while the sum is 37.

The square root of 12864637 is about 3586.7306840631. The cubic root of 12864637 is about 234.3145075763.

The spelling of 12864637 in words is "twelve million, eight hundred sixty-four thousand, six hundred thirty-seven".