12545861 has 2 divisors, whose sum is σ = 12545862. Its totient is φ = 12545860.

The previous prime is 12545843. The next prime is 12545867. The reversal of 12545861 is 16854521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7392961 + 5152900 = 2719^2 + 2270^2 .

It is a cyclic number.

It is not a de Polignac number, because 12545861 - 2¹⁸ = 12283717 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12545867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6272930 + 6272931.

It is an arithmetic number, because the mean of its divisors is an integer number (6272931).

Almost surely, 2^12545861 is an apocalyptic number.

It is an amenable number.

12545861 is a deficient number, since it is larger than the sum of its proper divisors (1).

12545861 is an equidigital number, since it uses as much as digits as its factorization.

12545861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9600, while the sum is 32.

The square root of 12545861 is about 3542.0136928024. The cubic root of 12545861 is about 232.3629191552.

The spelling of 12545861 in words is "twelve million, five hundred forty-five thousand, eight hundred sixty-one".