13559805 has 40 divisors (see below), whose sum is σ = 27785472. Its totient is φ = 6197472.

The previous prime is 13559801. The next prime is 13559813. The reversal of 13559805 is 50895531.

It is a happy number.

13559805 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 13559805 - 2² = 13559801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13559805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13559801) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 444 + ... + 5226.

Almost surely, 2^13559805 is an apocalyptic number.

13559805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13559805 is an abundant number, since it is smaller than the sum of its proper divisors (14225667).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13559805 is an equidigital number, since it uses as much as digits as its factorization.

13559805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4807 (or 4798 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 13559805 is about 3682.3640504437. The cubic root of 13559805 is about 238.4612491925.

The spelling of 13559805 in words is "thirteen million, five hundred fifty-nine thousand, eight hundred five".