12441561 has 16 divisors (see below), whose sum is σ = 19050240. Its totient is φ = 7143120.

The previous prime is 12441557. The next prime is 12441581. The reversal of 12441561 is 16514421.

It is a happy number.

It is not a de Polignac number, because 12441561 - 2² = 12441557 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12441521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9295 + ... + 10548.

It is an arithmetic number, because the mean of its divisors is an integer number (1190640).

Almost surely, 2^12441561 is an apocalyptic number.

12441561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12441561 is a deficient number, since it is larger than the sum of its proper divisors (6608679).

12441561 is a wasteful number, since it uses less digits than its factorization.

12441561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19876.

The product of its digits is 960, while the sum is 24.

The square root of 12441561 is about 3527.2597012412. The cubic root of 12441561 is about 231.7172101878.

Adding to 12441561 its reverse (16514421), we get a palindrome (28955982).

The spelling of 12441561 in words is "twelve million, four hundred forty-one thousand, five hundred sixty-one".