12466561 has 2 divisors, whose sum is σ = 12466562. Its totient is φ = 12466560.

The previous prime is 12466547. The next prime is 12466567. The reversal of 12466561 is 16566421.

12466561 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., 10660225 + 1806336 = 3265^2 + 1344^2 .

It is a cyclic number.

It is not a de Polignac number, because 12466561 - 2²¹ = 10369409 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12466567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6233280 + 6233281.

It is an arithmetic number, because the mean of its divisors is an integer number (6233281).

Almost surely, 2^12466561 is an apocalyptic number.

It is an amenable number.

12466561 is a deficient number, since it is larger than the sum of its proper divisors (1).

12466561 is an equidigital number, since it uses as much as digits as its factorization.

12466561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 31.

The square root of 12466561 is about 3530.8017503111. The cubic root of 12466561 is about 231.8723100847.

The spelling of 12466561 in words is "twelve million, four hundred sixty-six thousand, five hundred sixty-one".