12266220 has 24 divisors (see below), whose sum is σ = 34345584. Its totient is φ = 3270976.

The previous prime is 12266213. The next prime is 12266237. The reversal of 12266220 is 2266221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102159 + ... + 102278.

It is an arithmetic number, because the mean of its divisors is an integer number (1431066).

Almost surely, 2^12266220 is an apocalyptic number.

12266220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12266220 is an abundant number, since it is smaller than the sum of its proper divisors (22079364).

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

12266220 is a wasteful number, since it uses less digits than its factorization.

12266220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204449 (or 204447 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 12266220 is about 3502.3163763429. The cubic root of 12266220 is about 230.6235129640.

Subtracting from 12266220 its reverse (2266221), we obtain a palindrome (9999999).

The spelling of 12266220 in words is "twelve million, two hundred sixty-six thousand, two hundred twenty".