12209620 has 24 divisors (see below), whose sum is σ = 25893504. Its totient is φ = 4835616.

The previous prime is 12209591. The next prime is 12209623. The reversal of 12209620 is 2690221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12209591 and 12209600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12209623) by changing a digit.

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, 904 + ... + 5023.

It is an arithmetic number, because the mean of its divisors is an integer number (1078896).

Almost surely, 2^12209620 is an apocalyptic number.

12209620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12209620 is an abundant number, since it is smaller than the sum of its proper divisors (13683884).

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

12209620 is a wasteful number, since it uses less digits than its factorization.

12209620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6039 (or 6037 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 12209620 is about 3494.2266669465. The cubic root of 12209620 is about 230.2682440569.

Adding to 12209620 its reverse (2690221), we get a palindrome (14899841).

The spelling of 12209620 in words is "twelve million, two hundred nine thousand, six hundred twenty".