13405145 has 8 divisors (see below), whose sum is σ = 17323656. Its totient is φ = 9899136.

The previous prime is 13405123. The next prime is 13405151. The reversal of 13405145 is 54150431.

13405145 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2521744 + 10883401 = 1588^2 + 3299^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13405145 - 2⁸ = 13404889 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13405145.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 103052 + ... + 103181.

It is an arithmetic number, because the mean of its divisors is an integer number (2165457).

Almost surely, 2^13405145 is an apocalyptic number.

It is an amenable number.

13405145 is a deficient number, since it is larger than the sum of its proper divisors (3918511).

13405145 is a wasteful number, since it uses less digits than its factorization.

13405145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206251.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 13405145 is about 3661.3037295477. The cubic root of 13405145 is about 237.5511690303.

Adding to 13405145 its reverse (54150431), we get a palindrome (67555576).

The spelling of 13405145 in words is "thirteen million, four hundred five thousand, one hundred forty-five".