12644225 has 12 divisors (see below), whose sum is σ = 17104560. Its totient is φ = 9195600.

The previous prime is 12644213. The next prime is 12644237. The reversal of 12644225 is 52244621.

It is an interprime number because it is at equal distance from previous prime (12644213) and next prime (12644237).

It is not a de Polignac number, because 12644225 - 2¹⁰ = 12643201 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12644194 and 12644203.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 22715 + ... + 23264.

It is an arithmetic number, because the mean of its divisors is an integer number (1425380).

Almost surely, 2^12644225 is an apocalyptic number.

It is an amenable number.

12644225 is a deficient number, since it is larger than the sum of its proper divisors (4460335).

12644225 is a wasteful number, since it uses less digits than its factorization.

12644225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46000 (or 45995 counting only the distinct ones).

The product of its digits is 3840, while the sum is 26.

The square root of 12644225 is about 3555.8719043295. The cubic root of 12644225 is about 232.9686081969.

Adding to 12644225 its reverse (52244621), we get a palindrome (64888846).

The spelling of 12644225 in words is "twelve million, six hundred forty-four thousand, two hundred twenty-five".