13539855 has 16 divisors (see below), whose sum is σ = 24758784. Its totient is φ = 6189600.

The previous prime is 13539853. The next prime is 13539899. The reversal of 13539855 is 55893531.

It is a happy number.

13539855 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 13539855 - 2¹ = 13539853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13539853) 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 15 ways as a sum of consecutive naturals, for example, 64371 + ... + 64580.

It is an arithmetic number, because the mean of its divisors is an integer number (1547424).

Almost surely, 2^13539855 is an apocalyptic number.

13539855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13539855 is a deficient number, since it is larger than the sum of its proper divisors (11218929).

13539855 is a wasteful number, since it uses less digits than its factorization.

13539855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128966.

The product of its digits is 81000, while the sum is 39.

The square root of 13539855 is about 3679.6541957092. The cubic root of 13539855 is about 238.3442456194.

The spelling of 13539855 in words is "thirteen million, five hundred thirty-nine thousand, eight hundred fifty-five".