13424405 has 4 divisors (see below), whose sum is σ = 16109292. Its totient is φ = 10739520.

The previous prime is 13424401. The next prime is 13424413. The reversal of 13424405 is 50442431.

13424405 is digitally balanced in base 3, 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 4418404 + 9006001 = 2102^2 + 3001^2 .

It is not a de Polignac number, because 13424405 - 2² = 13424401 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 (13424401) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1342436 + ... + 1342445.

It is an arithmetic number, because the mean of its divisors is an integer number (4027323).

Almost surely, 2^13424405 is an apocalyptic number.

It is an amenable number.

13424405 is a deficient number, since it is larger than the sum of its proper divisors (2684887).

13424405 is an equidigital number, since it uses as much as digits as its factorization.

13424405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2684886.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 13424405 is about 3663.9329961122. The cubic root of 13424405 is about 237.6648827347.

Adding to 13424405 its reverse (50442431), we get a palindrome (63866836).

The spelling of 13424405 in words is "thirteen million, four hundred twenty-four thousand, four hundred five".