13520145 has 16 divisors (see below), whose sum is σ = 22000320. Its totient is φ = 7088064.

The previous prime is 13520099. The next prime is 13520147. The reversal of 13520145 is 54102531.

13520145 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13520145 - 2⁶ = 13520081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13520147) 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 in 15 ways as a sum of consecutive naturals, for example, 6754 + ... + 8523.

It is an arithmetic number, because the mean of its divisors is an integer number (1375020).

Almost surely, 2^13520145 is an apocalyptic number.

13520145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13520145 is a deficient number, since it is larger than the sum of its proper divisors (8480175).

13520145 is a wasteful number, since it uses less digits than its factorization.

13520145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15344.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 13520145 is about 3676.9749795178. The cubic root of 13520145 is about 238.2285366885.

Adding to 13520145 its reverse (54102531), we get a palindrome (67622676).

The spelling of 13520145 in words is "thirteen million, five hundred twenty thousand, one hundred forty-five".