12397442 has 32 divisors (see below), whose sum is σ = 20314800. Its totient is φ = 5660928.

The previous prime is 12397417. The next prime is 12397453. The reversal of 12397442 is 24479321.

12397442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 3521²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 11095561 + 1301881 = 3331^2 + 1141^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12397399 and 12397408.

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, 113684 + ... + 113792.

Almost surely, 2^12397442 is an apocalyptic number.

12397442 is a deficient number, since it is larger than the sum of its proper divisors (7917358).

12397442 is a wasteful number, since it uses less digits than its factorization.

12397442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230.

The product of its digits is 12096, while the sum is 32.

The square root of 12397442 is about 3521.0001420051. Note that the first 3 decimals coincide. The cubic root of 12397442 is about 231.4429884473.

The spelling of 12397442 in words is "twelve million, three hundred ninety-seven thousand, four hundred forty-two".