12681959 has 2 divisors, whose sum is σ = 12681960. Its totient is φ = 12681958.

The previous prime is 12681937. The next prime is 12682001. The reversal of 12681959 is 95918621.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12681959 - 2⁸ = 12681703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12681059) 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, 6340979 + 6340980.

It is an arithmetic number, because the mean of its divisors is an integer number (6340980).

Almost surely, 2^12681959 is an apocalyptic number.

12681959 is a deficient number, since it is larger than the sum of its proper divisors (1).

12681959 is an equidigital number, since it uses as much as digits as its factorization.

12681959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 41.

The square root of 12681959 is about 3561.1738233341. The cubic root of 12681959 is about 233.2001264628.

The spelling of 12681959 in words is "twelve million, six hundred eighty-one thousand, nine hundred fifty-nine".