12684361 has 2 divisors, whose sum is σ = 12684362. Its totient is φ = 12684360.

The previous prime is 12684359. The next prime is 12684367. The reversal of 12684361 is 16348621.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11289600 + 1394761 = 3360^2 + 1181^2 .

It is a cyclic number.

It is not a de Polignac number, because 12684361 - 2¹ = 12684359 is a prime.

Together with 12684359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12684367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6342180 + 6342181.

It is an arithmetic number, because the mean of its divisors is an integer number (6342181).

Almost surely, 2^12684361 is an apocalyptic number.

It is an amenable number.

12684361 is a deficient number, since it is larger than the sum of its proper divisors (1).

12684361 is an equidigital number, since it uses as much as digits as its factorization.

12684361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 31.

The square root of 12684361 is about 3561.5110557178. The cubic root of 12684361 is about 233.2148484613.

The spelling of 12684361 in words is "twelve million, six hundred eighty-four thousand, three hundred sixty-one".