12421072 has 10 divisors (see below), whose sum is σ = 24065858. Its totient is φ = 6210528.

The previous prime is 12421061. The next prime is 12421099. The reversal of 12421072 is 27012421.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9585216 + 2835856 = 3096^2 + 1684^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 388143 + ... + 388174.

Almost surely, 2^12421072 is an apocalyptic number.

It is an amenable number.

12421072 is a deficient number, since it is larger than the sum of its proper divisors (11644786).

12421072 is an equidigital number, since it uses as much as digits as its factorization.

12421072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776325 (or 776319 counting only the distinct ones).

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

The square root of 12421072 is about 3524.3541252264. The cubic root of 12421072 is about 231.5899415253.

Adding to 12421072 its reverse (27012421), we get a palindrome (39433493).

The spelling of 12421072 in words is "twelve million, four hundred twenty-one thousand, seventy-two".