13520747 has 4 divisors (see below), whose sum is σ = 13571280. Its totient is φ = 13470216.

The previous prime is 13520719. The next prime is 13520779. The reversal of 13520747 is 74702531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74702531 = 1657 ⋅45083.

It is a cyclic number.

It is not a de Polignac number, because 13520747 - 2²⁰ = 12472171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13520047) 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, 24863 + ... + 25400.

It is an arithmetic number, because the mean of its divisors is an integer number (3392820).

Almost surely, 2^13520747 is an apocalyptic number.

13520747 is a deficient number, since it is larger than the sum of its proper divisors (50533).

13520747 is an equidigital number, since it uses as much as digits as its factorization.

13520747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50532.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 13520747 is about 3677.0568393758. The cubic root of 13520747 is about 238.2320724358.

The spelling of 13520747 in words is "thirteen million, five hundred twenty thousand, seven hundred forty-seven".