12397842 has 24 divisors (see below), whose sum is σ = 28276560. Its totient is φ = 3915000.

The previous prime is 12397841. The next prime is 12397859. The reversal of 12397842 is 24879321.

12397842 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12397797 and 12397806.

It is not an unprimeable number, because it can be changed into a prime (12397841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17784 + ... + 18467.

It is an arithmetic number, because the mean of its divisors is an integer number (1178190).

Almost surely, 2^12397842 is an apocalyptic number.

12397842 is an abundant number, since it is smaller than the sum of its proper divisors (15878718).

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

12397842 is a wasteful number, since it uses less digits than its factorization.

12397842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36278 (or 36275 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 12397842 is about 3521.0569435895. The cubic root of 12397842 is about 231.4454775683.

The spelling of 12397842 in words is "twelve million, three hundred ninety-seven thousand, eight hundred forty-two".