12209412 has 48 divisors (see below), whose sum is σ = 30707712. Its totient is φ = 3764640.

The previous prime is 12209387. The next prime is 12209423. The reversal of 12209412 is 21490221.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7843 + ... + 9269.

It is an arithmetic number, because the mean of its divisors is an integer number (639744).

Almost surely, 2^12209412 is an apocalyptic number.

12209412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12209412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15353856).

12209412 is an abundant number, since it is smaller than the sum of its proper divisors (18498300).

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

12209412 is a wasteful number, since it uses less digits than its factorization.

12209412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1488 (or 1486 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 12209412 is about 3494.1969034386. The cubic root of 12209412 is about 230.2669364523.

Adding to 12209412 its reverse (21490221), we get a palindrome (33699633).

It can be divided in two parts, 12209 and 412, that added together give a palindrome (12621).

The spelling of 12209412 in words is "twelve million, two hundred nine thousand, four hundred twelve".