12646841 has 2 divisors, whose sum is σ = 12646842. Its totient is φ = 12646840.

The previous prime is 12646831. The next prime is 12646867. The reversal of 12646841 is 14864621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10627600 + 2019241 = 3260^2 + 1421^2 .

It is a cyclic number.

It is not a de Polignac number, because 12646841 - 2²² = 8452537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12646798 and 12646807.

It is not a weakly prime, because it can be changed into another prime (12646801) 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, 6323420 + 6323421.

It is an arithmetic number, because the mean of its divisors is an integer number (6323421).

Almost surely, 2^12646841 is an apocalyptic number.

It is an amenable number.

12646841 is a deficient number, since it is larger than the sum of its proper divisors (1).

12646841 is an equidigital number, since it uses as much as digits as its factorization.

12646841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 32.

The square root of 12646841 is about 3556.2397275774. The cubic root of 12646841 is about 232.9846736037.

The spelling of 12646841 in words is "twelve million, six hundred forty-six thousand, eight hundred forty-one".