13212418 has 4 divisors (see below), whose sum is σ = 19818630. Its totient is φ = 6606208.

The previous prime is 13212413. The next prime is 13212427. The reversal of 13212418 is 81421231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81421231 = 43 ⋅1893517.

It can be written as a sum of positive squares in only one way, i.e., 10195249 + 3017169 = 3193^2 + 1737^2 .

It is not an unprimeable number, because it can be changed into a prime (13212413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3303103 + ... + 3303106.

Almost surely, 2^13212418 is an apocalyptic number.

13212418 is a deficient number, since it is larger than the sum of its proper divisors (6606212).

13212418 is an equidigital number, since it uses as much as digits as its factorization.

13212418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6606211.

The product of its digits is 384, while the sum is 22.

The square root of 13212418 is about 3634.8889941785. Note that the first 3 decimals coincide. The cubic root of 13212418 is about 236.4072375993.

Adding to 13212418 its reverse (81421231), we get a palindrome (94633649).

The spelling of 13212418 in words is "thirteen million, two hundred twelve thousand, four hundred eighteen".