12404242 has 4 divisors (see below), whose sum is σ = 18606366. Its totient is φ = 6202120.

The previous prime is 12404201. The next prime is 12404269. The reversal of 12404242 is 24240421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24240421 = 113 ⋅214517.

It can be written as a sum of positive squares in only one way, i.e., 7017201 + 5387041 = 2649^2 + 2321^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3101059 + ... + 3101062.

Almost surely, 2^12404242 is an apocalyptic number.

12404242 is a deficient number, since it is larger than the sum of its proper divisors (6202124).

12404242 is an equidigital number, since it uses as much as digits as its factorization.

12404242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6202123.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 12404242 is about 3521.9656443526. The cubic root of 12404242 is about 231.4852962251.

Adding to 12404242 its reverse (24240421), we get a palindrome (36644663).

The spelling of 12404242 in words is "twelve million, four hundred four thousand, two hundred forty-two".