12398225 has 36 divisors (see below), whose sum is σ = 18553500. Its totient is φ = 8184960.

The previous prime is 12398207. The next prime is 12398231. The reversal of 12398225 is 52289321.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 784 + 12397441 = 28^2 + 3521^2 .

It is not a de Polignac number, because 12398225 - 2⁸ = 12397969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12398191 and 12398200.

It is an unprimeable number.

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, 35351 + ... + 35699.

It is an arithmetic number, because the mean of its divisors is an integer number (515375).

Almost surely, 2^12398225 is an apocalyptic number.

It is an amenable number.

12398225 is a deficient number, since it is larger than the sum of its proper divisors (6155275).

12398225 is a wasteful number, since it uses less digits than its factorization.

12398225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402 (or 390 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 12398225 is about 3521.1113302479. Note that the first 3 decimals coincide. The cubic root of 12398225 is about 231.4478608515.

The spelling of 12398225 in words is "twelve million, three hundred ninety-eight thousand, two hundred twenty-five".