12400006 has 4 divisors (see below), whose sum is σ = 18600012. Its totient is φ = 6200002.

The previous prime is 12400001. The next prime is 12400009. The reversal of 12400006 is 60000421.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12400001) by changing a digit.

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, 3100000 + ... + 3100003.

It is an arithmetic number, because the mean of its divisors is an integer number (4650003).

Almost surely, 2^12400006 is an apocalyptic number.

12400006 is a deficient number, since it is larger than the sum of its proper divisors (6200006).

12400006 is an equidigital number, since it uses as much as digits as its factorization.

12400006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6200005.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 12400006 is about 3521.3642242745. The cubic root of 12400006 is about 231.4589427847.

Adding to 12400006 its reverse (60000421), we get a palindrome (72400427).

The spelling of 12400006 in words is "twelve million, four hundred thousand, six".