12605839 has 2 divisors, whose sum is σ = 12605840. Its totient is φ = 12605838.

The previous prime is 12605821. The next prime is 12605851. The reversal of 12605839 is 93850621.

It is a strong prime.

It is an emirp because it is prime and its reverse (93850621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12605839 - 2¹³ = 12597647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12605899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6302919 + 6302920.

It is an arithmetic number, because the mean of its divisors is an integer number (6302920).

Almost surely, 2^12605839 is an apocalyptic number.

12605839 is a deficient number, since it is larger than the sum of its proper divisors (1).

12605839 is an equidigital number, since it uses as much as digits as its factorization.

12605839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 12605839 is about 3550.4702505443. The cubic root of 12605839 is about 232.7326164591.

The spelling of 12605839 in words is "twelve million, six hundred five thousand, eight hundred thirty-nine".