12241720 has 32 divisors (see below), whose sum is σ = 27645120. Its totient is φ = 4878720.

The previous prime is 12241703. The next prime is 12241729. The reversal of 12241720 is 2714221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12241729) 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, 18190 + ... + 18850.

It is an arithmetic number, because the mean of its divisors is an integer number (863910).

Almost surely, 2^12241720 is an apocalyptic number.

12241720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12241720 is an abundant number, since it is smaller than the sum of its proper divisors (15403400).

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

12241720 is a wasteful number, since it uses less digits than its factorization.

12241720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135 (or 1131 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 12241720 is about 3498.8169429108. The cubic root of 12241720 is about 230.4698649204.

Adding to 12241720 its reverse (2714221), we get a palindrome (14955941).

The spelling of 12241720 in words is "twelve million, two hundred forty-one thousand, seven hundred twenty".