12921061 has 2 divisors, whose sum is σ = 12921062. Its totient is φ = 12921060.

The previous prime is 12921053. The next prime is 12921089. The reversal of 12921061 is 16012921.

12921061 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12916836 + 4225 = 3594^2 + 65^2 .

It is an emirp because it is prime and its reverse (16012921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12921061 - 2³ = 12921053 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 (12921001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6460530 + 6460531.

It is an arithmetic number, because the mean of its divisors is an integer number (6460531).

Almost surely, 2^12921061 is an apocalyptic number.

It is an amenable number.

12921061 is a deficient number, since it is larger than the sum of its proper divisors (1).

12921061 is an equidigital number, since it uses as much as digits as its factorization.

12921061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 12921061 is about 3594.5877371404. The cubic root of 12921061 is about 234.6565739658.

Adding to 12921061 its reverse (16012921), we get a palindrome (28933982).

The spelling of 12921061 in words is "twelve million, nine hundred twenty-one thousand, sixty-one".