12634861 has 2 divisors, whose sum is σ = 12634862. Its totient is φ = 12634860.

The previous prime is 12634799. The next prime is 12634877. The reversal of 12634861 is 16843621.

It is a happy number.

12634861 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., 11492100 + 1142761 = 3390^2 + 1069^2 .

It is a cyclic number.

It is not a de Polignac number, because 12634861 - 2¹¹ = 12632813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12634361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6317430 + 6317431.

It is an arithmetic number, because the mean of its divisors is an integer number (6317431).

Almost surely, 2^12634861 is an apocalyptic number.

It is an amenable number.

12634861 is a deficient number, since it is larger than the sum of its proper divisors (1).

12634861 is an equidigital number, since it uses as much as digits as its factorization.

12634861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 31.

The square root of 12634861 is about 3554.5549651117. The cubic root of 12634861 is about 232.9110837330.

The spelling of 12634861 in words is "twelve million, six hundred thirty-four thousand, eight hundred sixty-one".