13242505 has 4 divisors (see below), whose sum is σ = 15891012. Its totient is φ = 10594000.

The previous prime is 13242497. The next prime is 13242511. The reversal of 13242505 is 50524231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50524231 = 67 ⋅754093.

It can be written as a sum of positive squares in 2 ways, for example, as 1498176 + 11744329 = 1224^2 + 3427^2 .

It is not a de Polignac number, because 13242505 - 2³ = 13242497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1324246 + ... + 1324255.

It is an arithmetic number, because the mean of its divisors is an integer number (3972753).

Almost surely, 2^13242505 is an apocalyptic number.

It is an amenable number.

13242505 is a deficient number, since it is larger than the sum of its proper divisors (2648507).

13242505 is an equidigital number, since it uses as much as digits as its factorization.

13242505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2648506.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 13242505 is about 3639.0252815830. The cubic root of 13242505 is about 236.5865485162.

Adding to 13242505 its reverse (50524231), we get a palindrome (63766736).

The spelling of 13242505 in words is "thirteen million, two hundred forty-two thousand, five hundred five".