12172361 has 2 divisors, whose sum is σ = 12172362. Its totient is φ = 12172360.

The previous prime is 12172333. The next prime is 12172387. The reversal of 12172361 is 16327121.

12172361 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., 11182336 + 990025 = 3344^2 + 995^2 .

It is an emirp because it is prime and its reverse (16327121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12172361 - 2¹⁴ = 12155977 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12172661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6086180 + 6086181.

It is an arithmetic number, because the mean of its divisors is an integer number (6086181).

Almost surely, 2^12172361 is an apocalyptic number.

It is an amenable number.

12172361 is a deficient number, since it is larger than the sum of its proper divisors (1).

12172361 is an equidigital number, since it uses as much as digits as its factorization.

12172361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 23.

The square root of 12172361 is about 3488.8910845711. The cubic root of 12172361 is about 230.0337757581.

Adding to 12172361 its reverse (16327121), we get a palindrome (28499482).

It can be divided in two parts, 121 and 72361, that multiplied together give a square (8755681 = 2959²).

The spelling of 12172361 in words is "twelve million, one hundred seventy-two thousand, three hundred sixty-one".