13505417 has 4 divisors (see below), whose sum is σ = 13639236. Its totient is φ = 13371600.

The previous prime is 13505413. The next prime is 13505423. The reversal of 13505417 is 71450531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71450531 = 101 ⋅707431.

It can be written as a sum of positive squares in 2 ways, for example, as 6635776 + 6869641 = 2576^2 + 2621^2 .

It is a cyclic number.

It is not a de Polignac number, because 13505417 - 2² = 13505413 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13505411) 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 3 ways as a sum of consecutive naturals, for example, 66758 + ... + 66959.

It is an arithmetic number, because the mean of its divisors is an integer number (3409809).

Almost surely, 2^13505417 is an apocalyptic number.

It is an amenable number.

13505417 is a deficient number, since it is larger than the sum of its proper divisors (133819).

13505417 is a wasteful number, since it uses less digits than its factorization.

13505417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133818.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 13505417 is about 3674.9717005713. The cubic root of 13505417 is about 238.1420015049.

Adding to 13505417 its reverse (71450531), we get a palindrome (84955948).

The spelling of 13505417 in words is "thirteen million, five hundred five thousand, four hundred seventeen".