12644751 has 16 divisors (see below), whose sum is σ = 19586048. Its totient is φ = 7106400.

The previous prime is 12644741. The next prime is 12644759. The reversal of 12644751 is 15744621.

12644751 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12644751 - 2⁹ = 12644239 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12644759) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3655 + ... + 6216.

It is an arithmetic number, because the mean of its divisors is an integer number (1224128).

Almost surely, 2^12644751 is an apocalyptic number.

12644751 is a deficient number, since it is larger than the sum of its proper divisors (6941297).

12644751 is an equidigital number, since it uses as much as digits as its factorization.

12644751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9942.

The product of its digits is 6720, while the sum is 30.

The square root of 12644751 is about 3555.9458657297. The cubic root of 12644751 is about 232.9718386516.

The spelling of 12644751 in words is "twelve million, six hundred forty-four thousand, seven hundred fifty-one".