13520305 has 8 divisors (see below), whose sum is σ = 17078400. Its totient is φ = 10246896.

The previous prime is 13520303. The next prime is 13520333. The reversal of 13520305 is 50302531.

13520305 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13520305 - 2¹ = 13520303 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (13520303) 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 7 ways as a sum of consecutive naturals, for example, 71065 + ... + 71254.

It is an arithmetic number, because the mean of its divisors is an integer number (2134800).

Almost surely, 2^13520305 is an apocalyptic number.

It is an amenable number.

13520305 is a deficient number, since it is larger than the sum of its proper divisors (3558095).

13520305 is a wasteful number, since it uses less digits than its factorization.

13520305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142343.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 13520305 is about 3676.9967364685. The cubic root of 13520305 is about 238.2294764322.

Adding to 13520305 its reverse (50302531), we get a palindrome (63822836).

The spelling of 13520305 in words is "thirteen million, five hundred twenty thousand, three hundred five".