12171361 has 2 divisors, whose sum is σ = 12171362. Its totient is φ = 12171360.

The previous prime is 12171353. The next prime is 12171389. The reversal of 12171361 is 16317121.

12171361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8294400 + 3876961 = 2880^2 + 1969^2 .

It is a cyclic number.

It is not a de Polignac number, because 12171361 - 2³ = 12171353 is a prime.

It is not a weakly prime, because it can be changed into another prime (12171311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6085680 + 6085681.

It is an arithmetic number, because the mean of its divisors is an integer number (6085681).

Almost surely, 2^12171361 is an apocalyptic number.

It is an amenable number.

12171361 is a deficient number, since it is larger than the sum of its proper divisors (1).

12171361 is an equidigital number, since it uses as much as digits as its factorization.

12171361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252, while the sum is 22.

The square root of 12171361 is about 3488.7477696159. The cubic root of 12171361 is about 230.0274762386.

Adding to 12171361 its reverse (16317121), we get a palindrome (28488482).

Subtracting 12171361 from its reverse (16317121), we obtain a triangular number (4145760 = T₂₈₇₉).

The spelling of 12171361 in words is "twelve million, one hundred seventy-one thousand, three hundred sixty-one".