12636851 has 4 divisors (see below), whose sum is σ = 12682104. Its totient is φ = 12591600.

The previous prime is 12636847. The next prime is 12636853. The reversal of 12636851 is 15863621.

It is a happy number.

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 12636851 - 2² = 12636847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12636853) 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 3 ways as a sum of consecutive naturals, for example, 22205 + ... + 22766.

It is an arithmetic number, because the mean of its divisors is an integer number (3170526).

Almost surely, 2^12636851 is an apocalyptic number.

12636851 is a deficient number, since it is larger than the sum of its proper divisors (45253).

12636851 is an equidigital number, since it uses as much as digits as its factorization.

12636851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45252.

The product of its digits is 8640, while the sum is 32.

The square root of 12636851 is about 3554.8348766152. The cubic root of 12636851 is about 232.9233109807.

The spelling of 12636851 in words is "twelve million, six hundred thirty-six thousand, eight hundred fifty-one".