12498209 has 4 divisors (see below), whose sum is σ = 12508416. Its totient is φ = 12488004.

The previous prime is 12498203. The next prime is 12498221. The reversal of 12498209 is 90289421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12498209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12498203) 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 in 3 ways as a sum of consecutive naturals, for example, 2969 + ... + 5814.

It is an arithmetic number, because the mean of its divisors is an integer number (3127104).

Almost surely, 2^12498209 is an apocalyptic number.

It is an amenable number.

12498209 is a deficient number, since it is larger than the sum of its proper divisors (10207).

12498209 is an equidigital number, since it uses as much as digits as its factorization.

12498209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10206.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 12498209 is about 3535.2806112104. The cubic root of 12498209 is about 232.0683570371.

The spelling of 12498209 in words is "twelve million, four hundred ninety-eight thousand, two hundred nine".