12644475 has 24 divisors (see below), whose sum is σ = 21306672. Its totient is φ = 6614400.

The previous prime is 12644473. The next prime is 12644477. The reversal of 12644475 is 57444621.

12644475 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12644473) and next prime (12644477).

It is not a de Polignac number, because 12644475 - 2¹ = 12644473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12644473) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2385 + ... + 5565.

It is an arithmetic number, because the mean of its divisors is an integer number (887778).

Almost surely, 2^12644475 is an apocalyptic number.

12644475 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12644475 is a deficient number, since it is larger than the sum of its proper divisors (8662197).

12644475 is a wasteful number, since it uses less digits than its factorization.

12644475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3247 (or 3242 counting only the distinct ones).

The product of its digits is 26880, while the sum is 33.

The square root of 12644475 is about 3555.9070572781. The cubic root of 12644475 is about 232.9701435953.

The spelling of 12644475 in words is "twelve million, six hundred forty-four thousand, four hundred seventy-five".