13605247 has 2 divisors, whose sum is σ = 13605248. Its totient is φ = 13605246.

The previous prime is 13605211. The next prime is 13605269. The reversal of 13605247 is 74250631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13605247 - 2¹¹ = 13603199 is a prime.

It is equal to p₈₈₆₀₃₃ and since 13605247 and 886033 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13605547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6802623 + 6802624.

It is an arithmetic number, because the mean of its divisors is an integer number (6802624).

Almost surely, 2^13605247 is an apocalyptic number.

13605247 is a deficient number, since it is larger than the sum of its proper divisors (1).

13605247 is an equidigital number, since it uses as much as digits as its factorization.

13605247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 13605247 is about 3688.5291106348. The cubic root of 13605247 is about 238.7273315283.

Adding to 13605247 its reverse (74250631), we get a palindrome (87855878).

The spelling of 13605247 in words is "thirteen million, six hundred five thousand, two hundred forty-seven".