13171205 has 4 divisors (see below), whose sum is σ = 15805452. Its totient is φ = 10536960.

The previous prime is 13171183. The next prime is 13171241. The reversal of 13171205 is 50217131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50217131 = 5107 ⋅9833.

It can be written as a sum of positive squares in 2 ways, for example, as 8392609 + 4778596 = 2897^2 + 2186^2 .

It is not a de Polignac number, because 13171205 - 2¹⁰ = 13170181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1317116 + ... + 1317125.

It is an arithmetic number, because the mean of its divisors is an integer number (3951363).

Almost surely, 2^13171205 is an apocalyptic number.

It is an amenable number.

13171205 is a deficient number, since it is larger than the sum of its proper divisors (2634247).

13171205 is an equidigital number, since it uses as much as digits as its factorization.

13171205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2634246.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 13171205 is about 3629.2154799626. The cubic root of 13171205 is about 236.1611761680.

Adding to 13171205 its reverse (50217131), we get a palindrome (63388336).

The spelling of 13171205 in words is "thirteen million, one hundred seventy-one thousand, two hundred five".