12444161 has 4 divisors (see below), whose sum is σ = 12873300. Its totient is φ = 12015024.

The previous prime is 12444139. The next prime is 12444163. The reversal of 12444161 is 16144421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16144421 = 997 ⋅16193.

It can be written as a sum of positive squares in 2 ways, for example, as 3682561 + 8761600 = 1919^2 + 2960^2 .

It is a cyclic number.

It is not a de Polignac number, because 12444161 - 2⁶ = 12444097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12444163) 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 3 ways as a sum of consecutive naturals, for example, 214526 + ... + 214583.

It is an arithmetic number, because the mean of its divisors is an integer number (3218325).

Almost surely, 2^12444161 is an apocalyptic number.

It is an amenable number.

12444161 is a deficient number, since it is larger than the sum of its proper divisors (429139).

12444161 is an equidigital number, since it uses as much as digits as its factorization.

12444161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429138.

The product of its digits is 768, while the sum is 23.

The square root of 12444161 is about 3527.6282400502. The cubic root of 12444161 is about 231.7333502521.

Adding to 12444161 its reverse (16144421), we get a palindrome (28588582).

The spelling of 12444161 in words is "twelve million, four hundred forty-four thousand, one hundred sixty-one".