12499906 has 4 divisors (see below), whose sum is σ = 18749862. Its totient is φ = 6249952.

The previous prime is 12499901. The next prime is 12499909. The reversal of 12499906 is 60999421.

12499906 is nontrivially palindromic in base 5.

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

It can be written as a sum of positive squares in only one way, i.e., 8755681 + 3744225 = 2959^2 + 1935^2 .

It is a Smith number, since the sum of its digits (40) 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 not an unprimeable number, because it can be changed into a prime (12499901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3124975 + ... + 3124978.

Almost surely, 2^12499906 is an apocalyptic number.

12499906 is a deficient number, since it is larger than the sum of its proper divisors (6249956).

12499906 is an equidigital number, since it uses as much as digits as its factorization.

12499906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6249955.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 12499906 is about 3535.5206123003. The cubic root of 12499906 is about 232.0788599334.

The spelling of 12499906 in words is "twelve million, four hundred ninety-nine thousand, nine hundred six".