13505445 has 48 divisors (see below), whose sum is σ = 24710400. Its totient is φ = 6814080.

The previous prime is 13505431. The next prime is 13505449. The reversal of 13505445 is 54450531.

13505445 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13505445 - 2⁵ = 13505413 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13505449) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 103030 + ... + 103160.

It is an arithmetic number, because the mean of its divisors is an integer number (514800).

Almost surely, 2^13505445 is an apocalyptic number.

13505445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13505445 is a deficient number, since it is larger than the sum of its proper divisors (11204955).

13505445 is a wasteful number, since it uses less digits than its factorization.

13505445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 13505445 is about 3674.9755101225. The cubic root of 13505445 is about 238.1421660802.

Adding to 13505445 its reverse (54450531), we get a palindrome (67955976).

The spelling of 13505445 in words is "thirteen million, five hundred five thousand, four hundred forty-five".