13544561 has 2 divisors, whose sum is σ = 13544562. Its totient is φ = 13544560.

The previous prime is 13544543. The next prime is 13544567. The reversal of 13544561 is 16544531.

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., 10144225 + 3400336 = 3185^2 + 1844^2 .

It is a cyclic number.

It is not a de Polignac number, because 13544561 - 2⁶ = 13544497 is a prime.

It is not a weakly prime, because it can be changed into another prime (13544567) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6772280 + 6772281.

It is an arithmetic number, because the mean of its divisors is an integer number (6772281).

Almost surely, 2^13544561 is an apocalyptic number.

It is an amenable number.

13544561 is a deficient number, since it is larger than the sum of its proper divisors (1).

13544561 is an equidigital number, since it uses as much as digits as its factorization.

13544561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 29.

The square root of 13544561 is about 3680.2936024182. The cubic root of 13544561 is about 238.3718559126.

The spelling of 13544561 in words is "thirteen million, five hundred forty-four thousand, five hundred sixty-one".