13144861 has 2 divisors, whose sum is σ = 13144862. Its totient is φ = 13144860.

The previous prime is 13144853. The next prime is 13144867. The reversal of 13144861 is 16844131.

13144861 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11519236 + 1625625 = 3394^2 + 1275^2 .

It is a cyclic number.

It is not a de Polignac number, because 13144861 - 2³ = 13144853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13144867) 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 as a sum of consecutive naturals, namely, 6572430 + 6572431.

It is an arithmetic number, because the mean of its divisors is an integer number (6572431).

Almost surely, 2^13144861 is an apocalyptic number.

It is an amenable number.

13144861 is a deficient number, since it is larger than the sum of its proper divisors (1).

13144861 is an equidigital number, since it uses as much as digits as its factorization.

13144861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 28.

The square root of 13144861 is about 3625.5842287830. The cubic root of 13144861 is about 236.0036207909.

Adding to 13144861 its reverse (16844131), we get a palindrome (29988992).

The spelling of 13144861 in words is "thirteen million, one hundred forty-four thousand, eight hundred sixty-one".