12218260 has 12 divisors (see below), whose sum is σ = 25658388. Its totient is φ = 4887296.

The previous prime is 12218243. The next prime is 12218299. The reversal of 12218260 is 6281221.

It can be written as a sum of positive squares in 2 ways, for example, as 2396304 + 9821956 = 1548^2 + 3134^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305437 + ... + 305476.

It is an arithmetic number, because the mean of its divisors is an integer number (2138199).

Almost surely, 2^12218260 is an apocalyptic number.

12218260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12218260 is an abundant number, since it is smaller than the sum of its proper divisors (13440128).

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

12218260 is a wasteful number, since it uses less digits than its factorization.

12218260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610922 (or 610920 counting only the distinct ones).

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

The square root of 12218260 is about 3495.4627733678. The cubic root of 12218260 is about 230.3225468260.

Adding to 12218260 its reverse (6281221), we get a palindrome (18499481).

The spelling of 12218260 in words is "twelve million, two hundred eighteen thousand, two hundred sixty".