13240615 has 4 divisors (see below), whose sum is σ = 15888744. Its totient is φ = 10592488.

The previous prime is 13240613. The next prime is 13240621. The reversal of 13240615 is 51604231.

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 13240615 - 2¹ = 13240613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13240613) 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, 1324057 + ... + 1324066.

It is an arithmetic number, because the mean of its divisors is an integer number (3972186).

Almost surely, 2^13240615 is an apocalyptic number.

13240615 is a deficient number, since it is larger than the sum of its proper divisors (2648129).

13240615 is an equidigital number, since it uses as much as digits as its factorization.

13240615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2648128.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 13240615 is about 3638.7655873936. The cubic root of 13240615 is about 236.5752925932.

Adding to 13240615 its reverse (51604231), we get a palindrome (64844846).

The spelling of 13240615 in words is "thirteen million, two hundred forty thousand, six hundred fifteen".