12644235 has 32 divisors (see below), whose sum is σ = 22632000. Its totient is φ = 6697728.

The previous prime is 12644213. The next prime is 12644237. The reversal of 12644235 is 53244621.

12644235 is a `hidden beast` number, since 12 + 644 + 2 + 3 + 5 = 666.

12644235 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12644235 - 2⁹ = 12643723 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 12644199 and 12644208.

It is not an unprimeable number, because it can be changed into a prime (12644237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30711 + ... + 31119.

It is an arithmetic number, because the mean of its divisors is an integer number (707250).

Almost surely, 2^12644235 is an apocalyptic number.

12644235 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12644235 is a deficient number, since it is larger than the sum of its proper divisors (9987765).

12644235 is a wasteful number, since it uses less digits than its factorization.

12644235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652 (or 646 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 12644235 is about 3555.8733104541. The cubic root of 12644235 is about 232.9686696132.

Adding to 12644235 its reverse (53244621), we get a palindrome (65888856).

The spelling of 12644235 in words is "twelve million, six hundred forty-four thousand, two hundred thirty-five".