13518121 has 8 divisors (see below), whose sum is σ = 13880160. Its totient is φ = 13160928.

The previous prime is 13518119. The next prime is 13518133. The reversal of 13518121 is 12181531.

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 13518121 - 2¹ = 13518119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13518092 and 13518101.

It is not an unprimeable number, because it can be changed into a prime (13518161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4830 + ... + 7096.

It is an arithmetic number, because the mean of its divisors is an integer number (1735020).

Almost surely, 2^13518121 is an apocalyptic number.

It is an amenable number.

13518121 is a deficient number, since it is larger than the sum of its proper divisors (362039).

13518121 is an equidigital number, since it uses as much as digits as its factorization.

13518121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2423.

The product of its digits is 240, while the sum is 22.

The square root of 13518121 is about 3676.6997429760. The cubic root of 13518121 is about 238.2166482898.

Adding to 13518121 its reverse (12181531), we get a palindrome (25699652).

The spelling of 13518121 in words is "thirteen million, five hundred eighteen thousand, one hundred twenty-one".