12904225 has 6 divisors (see below), whose sum is σ = 16001270. Its totient is φ = 10323360.

The previous prime is 12904223. The next prime is 12904237. The reversal of 12904225 is 52240921.

It can be written as a sum of positive squares in 3 ways, for example, as 166464 + 12737761 = 408^2 + 3569^2 .

It is not a de Polignac number, because 12904225 - 2¹ = 12904223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 516169 = 12904225 / (1 + 2 + 9 + 0 + 4 + 2 + 2 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 12904225.

It is not an unprimeable number, because it can be changed into a prime (12904223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 258060 + ... + 258109.

Almost surely, 2^12904225 is an apocalyptic number.

It is an amenable number.

12904225 is a deficient number, since it is larger than the sum of its proper divisors (3097045).

12904225 is an equidigital number, since it uses as much as digits as its factorization.

12904225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516179 (or 516174 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 12904225 is about 3592.2451196988. The cubic root of 12904225 is about 234.5546113582.

The spelling of 12904225 in words is "twelve million, nine hundred four thousand, two hundred twenty-five".