13504561 has 8 divisors (see below), whose sum is σ = 15931904. Its totient is φ = 11201760.

The previous prime is 13504549. The next prime is 13504571. The reversal of 13504561 is 16540531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13504561 - 2⁵ = 13504529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13504531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30900 + ... + 31333.

It is an arithmetic number, because the mean of its divisors is an integer number (1991488).

Almost surely, 2^13504561 is an apocalyptic number.

It is an amenable number.

13504561 is a deficient number, since it is larger than the sum of its proper divisors (2427343).

13504561 is an equidigital number, since it uses as much as digits as its factorization.

13504561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62271.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 13504561 is about 3674.8552352440. The cubic root of 13504561 is about 238.1369700952.

The spelling of 13504561 in words is "thirteen million, five hundred four thousand, five hundred sixty-one".