12561061 has 2 divisors, whose sum is σ = 12561062. Its totient is φ = 12561060.

The previous prime is 12561023. The next prime is 12561083. The reversal of 12561061 is 16016521.

It is an a-pointer prime, because the next prime (12561083) can be obtained adding 12561061 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6728836 + 5832225 = 2594^2 + 2415^2 .

It is an emirp because it is prime and its reverse (16016521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12561061 - 2¹¹ = 12559013 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 (12561091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6280530 + 6280531.

It is an arithmetic number, because the mean of its divisors is an integer number (6280531).

Almost surely, 2^12561061 is an apocalyptic number.

It is an amenable number.

12561061 is a deficient number, since it is larger than the sum of its proper divisors (1).

12561061 is an equidigital number, since it uses as much as digits as its factorization.

12561061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 12561061 is about 3544.1587154076. The cubic root of 12561061 is about 232.4567214315.

Adding to 12561061 its reverse (16016521), we get a palindrome (28577582).

The spelling of 12561061 in words is "twelve million, five hundred sixty-one thousand, sixty-one".