13173145 has 4 divisors (see below), whose sum is σ = 15807780. Its totient is φ = 10538512.

The previous prime is 13173143. The next prime is 13173197. The reversal of 13173145 is 54137131.

13173145 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5621641 + 7551504 = 2371^2 + 2748^2 .

It is a cyclic number.

It is not a de Polignac number, because 13173145 - 2¹ = 13173143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13173143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1317310 + ... + 1317319.

It is an arithmetic number, because the mean of its divisors is an integer number (3951945).

Almost surely, 2^13173145 is an apocalyptic number.

It is an amenable number.

13173145 is a deficient number, since it is larger than the sum of its proper divisors (2634635).

13173145 is an equidigital number, since it uses as much as digits as its factorization.

13173145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2634634.

The product of its digits is 1260, while the sum is 25.

The square root of 13173145 is about 3629.4827455162. The cubic root of 13173145 is about 236.1727704043.

The spelling of 13173145 in words is "thirteen million, one hundred seventy-three thousand, one hundred forty-five".