13521736 has 8 divisors (see below), whose sum is σ = 25353270. Its totient is φ = 6760864.

The previous prime is 13521733. The next prime is 13521751. The reversal of 13521736 is 63712531.

It can be written as a sum of positive squares in only one way, i.e., 10929636 + 2592100 = 3306^2 + 1610^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (13521733) 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 as a sum of consecutive naturals, namely, 845101 + ... + 845116.

Almost surely, 2^13521736 is an apocalyptic number.

It is an amenable number.

13521736 is a deficient number, since it is larger than the sum of its proper divisors (11831534).

13521736 is a wasteful number, since it uses less digits than its factorization.

13521736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690223 (or 1690219 counting only the distinct ones).

The product of its digits is 3780, while the sum is 28.

The square root of 13521736 is about 3677.1913194720. The cubic root of 13521736 is about 238.2378809358.

The spelling of 13521736 in words is "thirteen million, five hundred twenty-one thousand, seven hundred thirty-six".