12605261 has 2 divisors, whose sum is σ = 12605262. Its totient is φ = 12605260.

The previous prime is 12605249. The next prime is 12605273. The reversal of 12605261 is 16250621.

It is a balanced prime because it is at equal distance from previous prime (12605249) and next prime (12605273).

It can be written as a sum of positive squares in only one way, i.e., 6325225 + 6280036 = 2515^2 + 2506^2 .

It is an emirp because it is prime and its reverse (16250621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12605261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12605221) 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, 6302630 + 6302631.

It is an arithmetic number, because the mean of its divisors is an integer number (6302631).

Almost surely, 2^12605261 is an apocalyptic number.

It is an amenable number.

12605261 is a deficient number, since it is larger than the sum of its proper divisors (1).

12605261 is an equidigital number, since it uses as much as digits as its factorization.

12605261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 12605261 is about 3550.3888519428. The cubic root of 12605261 is about 232.7290593374.

Adding to 12605261 its reverse (16250621), we get a palindrome (28855882).

The spelling of 12605261 in words is "twelve million, six hundred five thousand, two hundred sixty-one".