12161444 has 12 divisors (see below), whose sum is σ = 22402800. Its totient is φ = 5760648.

The previous prime is 12161437. The next prime is 12161447. The reversal of 12161444 is 44416121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12161447) 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, 79934 + ... + 80085.

It is an arithmetic number, because the mean of its divisors is an integer number (1866900).

Almost surely, 2^12161444 is an apocalyptic number.

It is an amenable number.

12161444 is a deficient number, since it is larger than the sum of its proper divisors (10241356).

12161444 is a wasteful number, since it uses less digits than its factorization.

12161444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160042 (or 160040 counting only the distinct ones).

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

The square root of 12161444 is about 3487.3261963860. The cubic root of 12161444 is about 229.9649852179.

Adding to 12161444 its reverse (44416121), we get a palindrome (56577565).

The spelling of 12161444 in words is "twelve million, one hundred sixty-one thousand, four hundred forty-four".