12139559 has 2 divisors, whose sum is σ = 12139560. Its totient is φ = 12139558.

The previous prime is 12139541. The next prime is 12139573. The reversal of 12139559 is 95593121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12139559 - 2²⁰ = 11090983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12139579) 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, 6069779 + 6069780.

It is an arithmetic number, because the mean of its divisors is an integer number (6069780).

Almost surely, 2^12139559 is an apocalyptic number.

12139559 is a deficient number, since it is larger than the sum of its proper divisors (1).

12139559 is an equidigital number, since it uses as much as digits as its factorization.

12139559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12150, while the sum is 35.

The square root of 12139559 is about 3484.1869926857. The cubic root of 12139559 is about 229.8269586913.

The spelling of 12139559 in words is "twelve million, one hundred thirty-nine thousand, five hundred fifty-nine".