12861949 has 2 divisors, whose sum is σ = 12861950. Its totient is φ = 12861948.

The previous prime is 12861889. The next prime is 12861983. The reversal of 12861949 is 94916821.

12861949 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 can be written as a sum of positive squares in only one way, i.e., 8514724 + 4347225 = 2918^2 + 2085^2 .

It is a cyclic number.

It is not a de Polignac number, because 12861949 - 2¹¹ = 12859901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12861049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6430974 + 6430975.

It is an arithmetic number, because the mean of its divisors is an integer number (6430975).

Almost surely, 2^12861949 is an apocalyptic number.

It is an amenable number.

12861949 is a deficient number, since it is larger than the sum of its proper divisors (1).

12861949 is an equidigital number, since it uses as much as digits as its factorization.

12861949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 40.

The square root of 12861949 is about 3586.3559499860. The cubic root of 12861949 is about 234.2981868342.

The spelling of 12861949 in words is "twelve million, eight hundred sixty-one thousand, nine hundred forty-nine".