13040505 has 12 divisors (see below), whose sum is σ = 22603620. Its totient is φ = 6954912.

The previous prime is 13040497. The next prime is 13040527. The reversal of 13040505 is 50504031.

It can be written as a sum of positive squares in 2 ways, for example, as 7033104 + 6007401 = 2652^2 + 2451^2 .

It is not a de Polignac number, because 13040505 - 2³ = 13040497 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, 144850 + ... + 144939.

It is an arithmetic number, because the mean of its divisors is an integer number (1883635).

Almost surely, 2^13040505 is an apocalyptic number.

13040505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13040505 is a deficient number, since it is larger than the sum of its proper divisors (9563115).

13040505 is a wasteful number, since it uses less digits than its factorization.

13040505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289800 (or 289797 counting only the distinct ones).

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

The square root of 13040505 is about 3611.1639397845. The cubic root of 13040505 is about 235.3774227881.

Adding to 13040505 its reverse (50504031), we get a palindrome (63544536).

The spelling of 13040505 in words is "thirteen million, forty thousand, five hundred five".