12421899 has 36 divisors (see below), whose sum is σ = 21352656. Its totient is φ = 6811776.

The previous prime is 12421891. The next prime is 12421921. The reversal of 12421899 is 99812421.

12421899 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12421899 - 2³ = 12421891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12421891) 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 35 ways as a sum of consecutive naturals, for example, 170127 + ... + 170199.

Almost surely, 2^12421899 is an apocalyptic number.

12421899 is a deficient number, since it is larger than the sum of its proper divisors (8930757).

12421899 is an equidigital number, since it uses as much as digits as its factorization.

12421899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 120 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 12421899 is about 3524.4714497354. The cubic root of 12421899 is about 231.5950811953.

The spelling of 12421899 in words is "twelve million, four hundred twenty-one thousand, eight hundred ninety-nine".