13145387 has 2 divisors, whose sum is σ = 13145388. Its totient is φ = 13145386.

The previous prime is 13145357. The next prime is 13145393. The reversal of 13145387 is 78354131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13145387 - 2²⁰ = 12096811 is a prime.

It is not a weakly prime, because it can be changed into another prime (13145347) 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, 6572693 + 6572694.

It is an arithmetic number, because the mean of its divisors is an integer number (6572694).

Almost surely, 2^13145387 is an apocalyptic number.

13145387 is a deficient number, since it is larger than the sum of its proper divisors (1).

13145387 is an equidigital number, since it uses as much as digits as its factorization.

13145387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 32.

The square root of 13145387 is about 3625.6567680904. The cubic root of 13145387 is about 236.0067686941.

The spelling of 13145387 in words is "thirteen million, one hundred forty-five thousand, three hundred eighty-seven".