13724559 has 20 divisors (see below), whose sum is σ = 21710304. Its totient is φ = 8610624.

The previous prime is 13724549. The next prime is 13724597. The reversal of 13724559 is 95542731.

13724559 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13724559 - 2¹² = 13720463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13724549) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3607 + ... + 6360.

Almost surely, 2^13724559 is an apocalyptic number.

13724559 is a deficient number, since it is larger than the sum of its proper divisors (7985745).

13724559 is an equidigital number, since it uses as much as digits as its factorization.

13724559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9996 (or 9987 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 13724559 is about 3704.6671915302. The cubic root of 13724559 is about 239.4231458579.

The spelling of 13724559 in words is "thirteen million, seven hundred twenty-four thousand, five hundred fifty-nine".