13504427 has 4 divisors (see below), whose sum is σ = 14091600. Its totient is φ = 12917256.

The previous prime is 13504423. The next prime is 13504429. The reversal of 13504427 is 72440531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72440531 = 137 ⋅528763.

It is a cyclic number.

It is not a de Polignac number, because 13504427 - 2² = 13504423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13504396 and 13504405.

It is not an unprimeable number, because it can be changed into a prime (13504423) 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, 293552 + ... + 293597.

It is an arithmetic number, because the mean of its divisors is an integer number (3522900).

Almost surely, 2^13504427 is an apocalyptic number.

13504427 is a deficient number, since it is larger than the sum of its proper divisors (587173).

13504427 is an equidigital number, since it uses as much as digits as its factorization.

13504427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587172.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 13504427 is about 3674.8370031880. The cubic root of 13504427 is about 238.1361824487.

Adding to 13504427 its reverse (72440531), we get a palindrome (85944958).

It can be divided in two parts, 13504 and 427, that added together give a palindrome (13931).

The spelling of 13504427 in words is "thirteen million, five hundred four thousand, four hundred twenty-seven".