13521043 has 2 divisors, whose sum is σ = 13521044. Its totient is φ = 13521042.

The previous prime is 13521031. The next prime is 13521059. The reversal of 13521043 is 34012531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13521043 - 2⁹ = 13520531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13521043.

It is not a weakly prime, because it can be changed into another prime (13521023) 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, 6760521 + 6760522.

It is an arithmetic number, because the mean of its divisors is an integer number (6760522).

Almost surely, 2^13521043 is an apocalyptic number.

13521043 is a deficient number, since it is larger than the sum of its proper divisors (1).

13521043 is an equidigital number, since it uses as much as digits as its factorization.

13521043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 13521043 is about 3677.0970887373. The cubic root of 13521043 is about 238.2338109043.

Adding to 13521043 its reverse (34012531), we get a palindrome (47533574).

The spelling of 13521043 in words is "thirteen million, five hundred twenty-one thousand, forty-three".