12305861 has 2 divisors, whose sum is σ = 12305862. Its totient is φ = 12305860.

The previous prime is 12305849. The next prime is 12305879. The reversal of 12305861 is 16850321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8673025 + 3632836 = 2945^2 + 1906^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12305861 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12305861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12305261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6152930 + 6152931.

It is an arithmetic number, because the mean of its divisors is an integer number (6152931).

Almost surely, 2^12305861 is an apocalyptic number.

It is an amenable number.

12305861 is a deficient number, since it is larger than the sum of its proper divisors (1).

12305861 is an equidigital number, since it uses as much as digits as its factorization.

12305861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 12305861 is about 3507.9710660152. The cubic root of 12305861 is about 230.8716827624.

The spelling of 12305861 in words is "twelve million, three hundred five thousand, eight hundred sixty-one".