13005145 has 4 divisors (see below), whose sum is σ = 15606180. Its totient is φ = 10404112.

The previous prime is 13005133. The next prime is 13005173. The reversal of 13005145 is 54150031.

13005145 is digitally balanced in base 2, 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 8248384 + 4756761 = 2872^2 + 2181^2 .

It is a cyclic number.

It is not a de Polignac number, because 13005145 - 2¹⁹ = 12480857 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1300510 + ... + 1300519.

It is an arithmetic number, because the mean of its divisors is an integer number (3901545).

Almost surely, 2^13005145 is an apocalyptic number.

It is an amenable number.

13005145 is a deficient number, since it is larger than the sum of its proper divisors (2601035).

13005145 is an equidigital number, since it uses as much as digits as its factorization.

13005145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2601034.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 13005145 is about 3606.2646880117. The cubic root of 13005145 is about 235.1644842115.

Adding to 13005145 its reverse (54150031), we get a palindrome (67155176).

The spelling of 13005145 in words is "thirteen million, five thousand, one hundred forty-five".