13509872 has 20 divisors (see below), whose sum is σ = 26232696. Its totient is φ = 6740160.

The previous prime is 13509871. The next prime is 13509889. The reversal of 13509872 is 27890531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13509871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12722 + ... + 13742.

Almost surely, 2^13509872 is an apocalyptic number.

It is an amenable number.

13509872 is a deficient number, since it is larger than the sum of its proper divisors (12722824).

13509872 is a wasteful number, since it uses less digits than its factorization.

13509872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856 (or 1850 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 13509872 is about 3675.5777777106. The cubic root of 13509872 is about 238.1681837394.

The spelling of 13509872 in words is "thirteen million, five hundred nine thousand, eight hundred seventy-two".