12729361 has 2 divisors, whose sum is σ = 12729362. Its totient is φ = 12729360.

The previous prime is 12729359. The next prime is 12729383. The reversal of 12729361 is 16392721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10923025 + 1806336 = 3305^2 + 1344^2 .

It is a cyclic number.

It is not a de Polignac number, because 12729361 - 2¹ = 12729359 is a prime.

Together with 12729359, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12729331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6364680 + 6364681.

It is an arithmetic number, because the mean of its divisors is an integer number (6364681).

Almost surely, 2^12729361 is an apocalyptic number.

It is an amenable number.

12729361 is a deficient number, since it is larger than the sum of its proper divisors (1).

12729361 is an equidigital number, since it uses as much as digits as its factorization.

12729361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 31.

The square root of 12729361 is about 3567.8230056997. The cubic root of 12729361 is about 233.4903131857.

The spelling of 12729361 in words is "twelve million, seven hundred twenty-nine thousand, three hundred sixty-one".