12663425 has 6 divisors (see below), whose sum is σ = 15702678. Its totient is φ = 10130720.

The previous prime is 12663403. The next prime is 12663433. The reversal of 12663425 is 52436621.

It can be written as a sum of positive squares in 3 ways, for example, as 53824 + 12609601 = 232^2 + 3551^2 .

It is not a de Polignac number, because 12663425 - 2¹⁰ = 12662401 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 253244 + ... + 253293.

It is an arithmetic number, because the mean of its divisors is an integer number (2617113).

Almost surely, 2^12663425 is an apocalyptic number.

It is an amenable number.

12663425 is a deficient number, since it is larger than the sum of its proper divisors (3039253).

12663425 is an equidigital number, since it uses as much as digits as its factorization.

12663425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506547 (or 506542 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 12663425 is about 3558.5706400183. The cubic root of 12663425 is about 233.0864679348.

The spelling of 12663425 in words is "twelve million, six hundred sixty-three thousand, four hundred twenty-five".