13004505 has 12 divisors (see below), whose sum is σ = 22541220. Its totient is φ = 6935712.

The previous prime is 13004491. The next prime is 13004513. The reversal of 13004505 is 50540031.

It can be written as a sum of positive squares in 2 ways, for example, as 8928144 + 4076361 = 2988^2 + 2019^2 .

It is not a de Polignac number, because 13004505 - 2⁴ = 13004489 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 144450 + ... + 144539.

It is an arithmetic number, because the mean of its divisors is an integer number (1878435).

Almost surely, 2^13004505 is an apocalyptic number.

13004505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13004505 is a deficient number, since it is larger than the sum of its proper divisors (9536715).

13004505 is a wasteful number, since it uses less digits than its factorization.

13004505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289000 (or 288997 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 13004505 is about 3606.1759524460. The cubic root of 13004505 is about 235.1606265654.

Adding to 13004505 its reverse (50540031), we get a palindrome (63544536).

The spelling of 13004505 in words is "thirteen million, four thousand, five hundred five".