13504421 has 8 divisors (see below), whose sum is σ = 16246080. Its totient is φ = 10965888.

The previous prime is 13504411. The next prime is 13504423. The reversal of 13504421 is 12440531.

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

It is not a de Polignac number, because 13504421 - 2¹⁴ = 13488037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13504393 and 13504402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13504423) 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 7 ways as a sum of consecutive naturals, for example, 50636 + ... + 50901.

It is an arithmetic number, because the mean of its divisors is an integer number (2030760).

Almost surely, 2^13504421 is an apocalyptic number.

It is an amenable number.

13504421 is a deficient number, since it is larger than the sum of its proper divisors (2741659).

13504421 is a wasteful number, since it uses less digits than its factorization.

13504421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101563.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 13504421 is about 3674.8361868252. The cubic root of 13504421 is about 238.1361471808.

Adding to 13504421 its reverse (12440531), we get a palindrome (25944952).

The spelling of 13504421 in words is "thirteen million, five hundred four thousand, four hundred twenty-one".