12355559 has 2 divisors, whose sum is σ = 12355560. Its totient is φ = 12355558.

The previous prime is 12355543. The next prime is 12355579. The reversal of 12355559 is 95555321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12355559 - 2⁴ = 12355543 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12355579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6177779 + 6177780.

It is an arithmetic number, because the mean of its divisors is an integer number (6177780).

Almost surely, 2^12355559 is an apocalyptic number.

12355559 is a deficient number, since it is larger than the sum of its proper divisors (1).

12355559 is an equidigital number, since it uses as much as digits as its factorization.

12355559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33750, while the sum is 35.

The square root of 12355559 is about 3515.0475103475. The cubic root of 12355559 is about 231.1820619516.

It can be divided in two parts, 1235 and 5559, that multiplied together give a triangular number (6865365 = T₃₇₀₅).

The spelling of 12355559 in words is "twelve million, three hundred fifty-five thousand, five hundred fifty-nine".