12403242 has 24 divisors (see below), whose sum is σ = 27801540. Its totient is φ = 3991680.

The previous prime is 12403199. The next prime is 12403243. The reversal of 12403242 is 24230421.

It can be written as a sum of positive squares in 2 ways, for example, as 12383361 + 19881 = 3519^2 + 141^2 .

It is a super-2 number, since 2×12403242² = 307680824221128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12403243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11359 + ... + 12402.

Almost surely, 2^12403242 is an apocalyptic number.

12403242 is an abundant number, since it is smaller than the sum of its proper divisors (15398298).

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

12403242 is a wasteful number, since it uses less digits than its factorization.

12403242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23798 (or 23795 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 12403242 is about 3521.8236753137. The cubic root of 12403242 is about 231.4790754629.

Adding to 12403242 its reverse (24230421), we get a palindrome (36633663).

The spelling of 12403242 in words is "twelve million, four hundred three thousand, two hundred forty-two".