13241240405 has 4 divisors (see below), whose sum is σ = 15889488492. Its totient is φ = 10592992320.

The previous prime is 13241240399. The next prime is 13241240407. The reversal of 13241240405 is 50404214231.

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 9362691121 + 3878549284 = 96761^2 + 62278^2 .

It is not a de Polignac number, because 13241240405 - 2¹⁰ = 13241239381 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 (13241240407) 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, 1324124036 + ... + 1324124045.

It is an arithmetic number, because the mean of its divisors is an integer number (3972372123).

Almost surely, 2^13241240405 is an apocalyptic number.

It is an amenable number.

13241240405 is a deficient number, since it is larger than the sum of its proper divisors (2648248087).

13241240405 is an equidigital number, since it uses as much as digits as its factorization.

13241240405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2648248086.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 13241240405 its reverse (50404214231), we get a palindrome (63645454636).

The spelling of 13241240405 in words is "thirteen billion, two hundred forty-one million, two hundred forty thousand, four hundred five".