13043605 has 4 divisors (see below), whose sum is σ = 15652332. Its totient is φ = 10434880.

The previous prime is 13043603. The next prime is 13043629. The reversal of 13043605 is 50634031.

13043605 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 3470769 + 9572836 = 1863^2 + 3094^2 .

It is not a de Polignac number, because 13043605 - 2¹ = 13043603 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13043603) 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, 1304356 + ... + 1304365.

It is an arithmetic number, because the mean of its divisors is an integer number (3913083).

Almost surely, 2^13043605 is an apocalyptic number.

It is an amenable number.

13043605 is a deficient number, since it is larger than the sum of its proper divisors (2608727).

13043605 is an equidigital number, since it uses as much as digits as its factorization.

13043605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2608726.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 13043605 is about 3611.5931387685. The cubic root of 13043605 is about 235.3960726845.

Adding to 13043605 its reverse (50634031), we get a palindrome (63677636).

The spelling of 13043605 in words is "thirteen million, forty-three thousand, six hundred five".