13128587 has 2 divisors, whose sum is σ = 13128588. Its totient is φ = 13128586.

The previous prime is 13128581. The next prime is 13128613. The reversal of 13128587 is 78582131.

It is a weak prime.

It is an emirp because it is prime and its reverse (78582131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13128587 - 2⁴ = 13128571 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13128581) 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, 6564293 + 6564294.

It is an arithmetic number, because the mean of its divisors is an integer number (6564294).

Almost surely, 2^13128587 is an apocalyptic number.

13128587 is a deficient number, since it is larger than the sum of its proper divisors (1).

13128587 is an equidigital number, since it uses as much as digits as its factorization.

13128587 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 13128587 is about 3623.3392057603. The cubic root of 13128587 is about 235.9061857802.

The spelling of 13128587 in words is "thirteen million, one hundred twenty-eight thousand, five hundred eighty-seven".