12541861 has 2 divisors, whose sum is σ = 12541862. Its totient is φ = 12541860.

The previous prime is 12541849. The next prime is 12541883. The reversal of 12541861 is 16814521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10439361 + 2102500 = 3231^2 + 1450^2 .

It is a cyclic number.

It is not a de Polignac number, because 12541861 - 2⁵ = 12541829 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 (12541811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6270930 + 6270931.

It is an arithmetic number, because the mean of its divisors is an integer number (6270931).

Almost surely, 2^12541861 is an apocalyptic number.

It is an amenable number.

12541861 is a deficient number, since it is larger than the sum of its proper divisors (1).

12541861 is an equidigital number, since it uses as much as digits as its factorization.

12541861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 28.

The square root of 12541861 is about 3541.4489972326. The cubic root of 12541861 is about 232.3382217543.

The spelling of 12541861 in words is "twelve million, five hundred forty-one thousand, eight hundred sixty-one".