13581287 has 2 divisors, whose sum is σ = 13581288. Its totient is φ = 13581286.

The previous prime is 13581229. The next prime is 13581289. The reversal of 13581287 is 78218531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13581287 - 2¹⁶ = 13515751 is a prime.

Together with 13581289, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₈₈₄₅₅₅ and since 13581287 and 884555 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 (13581289) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6790643 + 6790644.

It is an arithmetic number, because the mean of its divisors is an integer number (6790644).

Almost surely, 2^13581287 is an apocalyptic number.

13581287 is a deficient number, since it is larger than the sum of its proper divisors (1).

13581287 is an equidigital number, since it uses as much as digits as its factorization.

13581287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 35.

The square root of 13581287 is about 3685.2797722832. The cubic root of 13581287 is about 238.5871094532.

The spelling of 13581287 in words is "thirteen million, five hundred eighty-one thousand, two hundred eighty-seven".