13504143 has 4 divisors (see below), whose sum is σ = 18005528. Its totient is φ = 9002760.

The previous prime is 13504109. The next prime is 13504157. The reversal of 13504143 is 34140531.

13504143 is digitally balanced in base 3, 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 not a de Polignac number, because 13504143 - 2⁸ = 13503887 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 (13504163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2250688 + ... + 2250693.

It is an arithmetic number, because the mean of its divisors is an integer number (4501382).

Almost surely, 2^13504143 is an apocalyptic number.

13504143 is a deficient number, since it is larger than the sum of its proper divisors (4501385).

13504143 is an equidigital number, since it uses as much as digits as its factorization.

13504143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4501384.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 13504143 is about 3674.7983618152. The cubic root of 13504143 is about 238.1345130912.

Adding to 13504143 its reverse (34140531), we get a palindrome (47644674).

The spelling of 13504143 in words is "thirteen million, five hundred four thousand, one hundred forty-three".