12644887 has 8 divisors (see below), whose sum is σ = 12886560. Its totient is φ = 12405120.

The previous prime is 12644867. The next prime is 12644893. The reversal of 12644887 is 78844621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12644887 - 2⁷ = 12644759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12644857) 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 7 ways as a sum of consecutive naturals, for example, 21939 + ... + 22507.

It is an arithmetic number, because the mean of its divisors is an integer number (1610820).

Almost surely, 2^12644887 is an apocalyptic number.

12644887 is a deficient number, since it is larger than the sum of its proper divisors (241673).

12644887 is an equidigital number, since it uses as much as digits as its factorization.

12644887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953.

The product of its digits is 86016, while the sum is 40.

The square root of 12644887 is about 3555.9649885790. The cubic root of 12644887 is about 232.9726738877.

It can be divided in two parts, 12644 and 887, that added together give a palindrome (13531).

The spelling of 12644887 in words is "twelve million, six hundred forty-four thousand, eight hundred eighty-seven".