13520043 has 6 divisors (see below), whose sum is σ = 19528964. Its totient is φ = 9013356.

The previous prime is 13520011. The next prime is 13520047. The reversal of 13520043 is 34002531.

It is not a de Polignac number, because 13520043 - 2⁵ = 13520011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13519998 and 13520025.

It is not an unprimeable number, because it can be changed into a prime (13520047) 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 5 ways as a sum of consecutive naturals, for example, 751105 + ... + 751122.

Almost surely, 2^13520043 is an apocalyptic number.

13520043 is a deficient number, since it is larger than the sum of its proper divisors (6008921).

13520043 is a wasteful number, since it uses less digits than its factorization.

13520043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502233 (or 1502230 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 13520043 is about 3676.9611093946. The cubic root of 13520043 is about 238.2279375980.

Adding to 13520043 its reverse (34002531), we get a palindrome (47522574).

The spelling of 13520043 in words is "thirteen million, five hundred twenty thousand, forty-three".