12660541 has 2 divisors, whose sum is σ = 12660542. Its totient is φ = 12660540.

The previous prime is 12660523. The next prime is 12660551. The reversal of 12660541 is 14506621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11758041 + 902500 = 3429^2 + 950^2 .

It is a cyclic number.

It is not a de Polignac number, because 12660541 - 2⁷ = 12660413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12660551) 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, 6330270 + 6330271.

It is an arithmetic number, because the mean of its divisors is an integer number (6330271).

Almost surely, 2^12660541 is an apocalyptic number.

It is an amenable number.

12660541 is a deficient number, since it is larger than the sum of its proper divisors (1).

12660541 is an equidigital number, since it uses as much as digits as its factorization.

12660541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 12660541 is about 3558.1653980668. The cubic root of 12660541 is about 233.0687720268.

The spelling of 12660541 in words is "twelve million, six hundred sixty thousand, five hundred forty-one".