12406657 has 2 divisors, whose sum is σ = 12406658. Its totient is φ = 12406656.

The previous prime is 12406649. The next prime is 12406663. The reversal of 12406657 is 75660421.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12397441 + 9216 = 3521^2 + 96^2 .

It is a cyclic number.

It is not a de Polignac number, because 12406657 - 2³ = 12406649 is a prime.

It is not a weakly prime, because it can be changed into another prime (12406627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6203328 + 6203329.

It is an arithmetic number, because the mean of its divisors is an integer number (6203329).

Almost surely, 2^12406657 is an apocalyptic number.

It is an amenable number.

12406657 is a deficient number, since it is larger than the sum of its proper divisors (1).

12406657 is an equidigital number, since it uses as much as digits as its factorization.

12406657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 12406657 is about 3522.3084759856. The cubic root of 12406657 is about 231.5003179871.

The spelling of 12406657 in words is "twelve million, four hundred six thousand, six hundred fifty-seven".