12218145 has 8 divisors (see below), whose sum is σ = 19549056. Its totient is φ = 6516336.

The previous prime is 12218119. The next prime is 12218153. The reversal of 12218145 is 54181221.

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

It is not a de Polignac number, because 12218145 - 2⁵ = 12218113 is a prime.

It is an unprimeable number.

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, 407257 + ... + 407286.

It is an arithmetic number, because the mean of its divisors is an integer number (2443632).

Almost surely, 2^12218145 is an apocalyptic number.

12218145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12218145 is a deficient number, since it is larger than the sum of its proper divisors (7330911).

12218145 is an equidigital number, since it uses as much as digits as its factorization.

12218145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814551.

The product of its digits is 640, while the sum is 24.

The square root of 12218145 is about 3495.4463234328. The cubic root of 12218145 is about 230.3218242142.

Adding to 12218145 its reverse (54181221), we get a palindrome (66399366).

The spelling of 12218145 in words is "twelve million, two hundred eighteen thousand, one hundred forty-five".