13542209 has 2 divisors, whose sum is σ = 13542210. Its totient is φ = 13542208.

The previous prime is 13542161. The next prime is 13542227. The reversal of 13542209 is 90224531.

13542209 is digitally balanced in base 3, 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., 13359025 + 183184 = 3655^2 + 428^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13542209 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13542229) 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, 6771104 + 6771105.

It is an arithmetic number, because the mean of its divisors is an integer number (6771105).

Almost surely, 2^13542209 is an apocalyptic number.

It is an amenable number.

13542209 is a deficient number, since it is larger than the sum of its proper divisors (1).

13542209 is an equidigital number, since it uses as much as digits as its factorization.

13542209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 13542209 is about 3679.9740488215. The cubic root of 13542209 is about 238.3580574326.

The spelling of 13542209 in words is "thirteen million, five hundred forty-two thousand, two hundred nine".