12405779 has 2 divisors, whose sum is σ = 12405780. Its totient is φ = 12405778.

The previous prime is 12405751. The next prime is 12405793. The reversal of 12405779 is 97750421.

12405779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12405779 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12405709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6202889 + 6202890.

It is an arithmetic number, because the mean of its divisors is an integer number (6202890).

Almost surely, 2^12405779 is an apocalyptic number.

12405779 is a deficient number, since it is larger than the sum of its proper divisors (1).

12405779 is an equidigital number, since it uses as much as digits as its factorization.

12405779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 12405779 is about 3522.1838396086. The cubic root of 12405779 is about 231.4948568847.

The spelling of 12405779 in words is "twelve million, four hundred five thousand, seven hundred seventy-nine".