13145515 has 4 divisors (see below), whose sum is σ = 15774624. Its totient is φ = 10516408.

The previous prime is 13145513. The next prime is 13145527. The reversal of 13145515 is 51554131.

It is a happy number.

13145515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13145515 - 2¹ = 13145513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13145515.

It is not an unprimeable number, because it can be changed into a prime (13145513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1314547 + ... + 1314556.

It is an arithmetic number, because the mean of its divisors is an integer number (3943656).

Almost surely, 2^13145515 is an apocalyptic number.

13145515 is a deficient number, since it is larger than the sum of its proper divisors (2629109).

13145515 is an equidigital number, since it uses as much as digits as its factorization.

13145515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2629108.

The product of its digits is 1500, while the sum is 25.

The square root of 13145515 is about 3625.6744200217. The cubic root of 13145515 is about 236.0075347111.

Adding to 13145515 its reverse (51554131), we get a palindrome (64699646).

The spelling of 13145515 in words is "thirteen million, one hundred forty-five thousand, five hundred fifteen".