13240105 has 4 divisors (see below), whose sum is σ = 15888132. Its totient is φ = 10592080.

The previous prime is 13240103. The next prime is 13240109. The reversal of 13240105 is 50104231.

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 10010896 + 3229209 = 3164^2 + 1797^2 .

It is not a de Polignac number, because 13240105 - 2¹ = 13240103 is a prime.

It is a super-2 number, since 2×13240105² = 350600760822050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13240103) 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, 1324006 + ... + 1324015.

It is an arithmetic number, because the mean of its divisors is an integer number (3972033).

Almost surely, 2^13240105 is an apocalyptic number.

It is an amenable number.

13240105 is a deficient number, since it is larger than the sum of its proper divisors (2648027).

13240105 is an equidigital number, since it uses as much as digits as its factorization.

13240105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2648026.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 13240105 is about 3638.6955080083. The cubic root of 13240105 is about 236.5722550971.

Adding to 13240105 its reverse (50104231), we get a palindrome (63344336).

The spelling of 13240105 in words is "thirteen million, two hundred forty thousand, one hundred five".