12559381 has 2 divisors, whose sum is σ = 12559382. Its totient is φ = 12559380.

The previous prime is 12559373. The next prime is 12559423. The reversal of 12559381 is 18395521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12489156 + 70225 = 3534^2 + 265^2 .

It is a cyclic number.

It is not a de Polignac number, because 12559381 - 2³ = 12559373 is a prime.

It is a super-2 number, since 2×12559381² = 315476102206322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12559181) 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, 6279690 + 6279691.

It is an arithmetic number, because the mean of its divisors is an integer number (6279691).

Almost surely, 2^12559381 is an apocalyptic number.

It is an amenable number.

12559381 is a deficient number, since it is larger than the sum of its proper divisors (1).

12559381 is an equidigital number, since it uses as much as digits as its factorization.

12559381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 34.

The square root of 12559381 is about 3543.9216977806. The cubic root of 12559381 is about 232.4463575324.

The spelling of 12559381 in words is "twelve million, five hundred fifty-nine thousand, three hundred eighty-one".