12904502225 has 6 divisors (see below), whose sum is σ = 16001582790. Its totient is φ = 10323601760.

The previous prime is 12904502209. The next prime is 12904502227. The reversal of 12904502225 is 52220540921.

It can be written as a sum of positive squares in 3 ways, for example, as 62853184 + 12841649041 = 7928^2 + 113321^2 .

It is not a de Polignac number, because 12904502225 - 2⁴ = 12904502209 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12904502191 and 12904502200.

It is not an unprimeable number, because it can be changed into a prime (12904502227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 258090020 + ... + 258090069.

It is an arithmetic number, because the mean of its divisors is an integer number (2666930465).

Almost surely, 2^12904502225 is an apocalyptic number.

It is an amenable number.

12904502225 is a deficient number, since it is larger than the sum of its proper divisors (3097080565).

12904502225 is an equidigital number, since it uses as much as digits as its factorization.

12904502225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516180099 (or 516180094 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 12904502225 in words is "twelve billion, nine hundred four million, five hundred two thousand, two hundred twenty-five".