12005418 has 8 divisors (see below), whose sum is σ = 24010848. Its totient is φ = 4001804.

The previous prime is 12005407. The next prime is 12005419. The reversal of 12005418 is 81450021.

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

12005418 is an admirable number.

It is a super-2 number, since 2×12005418² = 288260122709448, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12005394 and 12005403.

It is not an unprimeable number, because it can be changed into a prime (12005419) 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 3 ways as a sum of consecutive naturals, for example, 1000446 + ... + 1000457.

It is an arithmetic number, because the mean of its divisors is an integer number (3001356).

Almost surely, 2^12005418 is an apocalyptic number.

12005418 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12005418 is a wasteful number, since it uses less digits than its factorization.

12005418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000908.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 12005418 is about 3464.8835478267. The cubic root of 12005418 is about 228.9772992251.

Adding to 12005418 its reverse (81450021), we get a palindrome (93455439).

The spelling of 12005418 in words is "twelve million, five thousand, four hundred eighteen".