13128187 has 2 divisors, whose sum is σ = 13128188. Its totient is φ = 13128186.

The previous prime is 13128169. The next prime is 13128251. The reversal of 13128187 is 78182131.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13128187 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13128587) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6564093 + 6564094.

It is an arithmetic number, because the mean of its divisors is an integer number (6564094).

Almost surely, 2^13128187 is an apocalyptic number.

13128187 is a deficient number, since it is larger than the sum of its proper divisors (1).

13128187 is an equidigital number, since it uses as much as digits as its factorization.

13128187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 31.

The square root of 13128187 is about 3623.2840076373. The cubic root of 13128187 is about 235.9037899034.

The spelling of 13128187 in words is "thirteen million, one hundred twenty-eight thousand, one hundred eighty-seven".