13521044 has 12 divisors (see below), whose sum is σ = 23701524. Its totient is φ = 6749184.

The previous prime is 13521043. The next prime is 13521059. The reversal of 13521044 is 44012531.

It can be written as a sum of positive squares in 2 ways, for example, as 10316944 + 3204100 = 3212^2 + 1790^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13521043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212 + ... + 5204.

It is an arithmetic number, because the mean of its divisors is an integer number (1975127).

Almost surely, 2^13521044 is an apocalyptic number.

It is an amenable number.

13521044 is a deficient number, since it is larger than the sum of its proper divisors (10180480).

13521044 is a wasteful number, since it uses less digits than its factorization.

13521044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5674 (or 5672 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 13521044 is about 3677.0972247141. The cubic root of 13521044 is about 238.2338167775.

Adding to 13521044 its reverse (44012531), we get a palindrome (57533575).

The spelling of 13521044 in words is "thirteen million, five hundred twenty-one thousand, forty-four".