12660425 has 6 divisors (see below), whose sum is σ = 15698958. Its totient is φ = 10128320.

The previous prime is 12660421. The next prime is 12660457. The reversal of 12660425 is 52406621.

It can be written as a sum of positive squares in 3 ways, for example, as 100489 + 12559936 = 317^2 + 3544^2 .

It is not a de Polignac number, because 12660425 - 2² = 12660421 is a prime.

It is a super-2 number, since 2×12660425² = 320572722361250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12660394 and 12660403.

It is not an unprimeable number, because it can be changed into a prime (12660421) 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, 253184 + ... + 253233.

It is an arithmetic number, because the mean of its divisors is an integer number (2616493).

Almost surely, 2^12660425 is an apocalyptic number.

It is an amenable number.

12660425 is a deficient number, since it is larger than the sum of its proper divisors (3038533).

12660425 is an equidigital number, since it uses as much as digits as its factorization.

12660425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506427 (or 506422 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 12660425 is about 3558.1490974944. The cubic root of 12660425 is about 233.0680602073.

The spelling of 12660425 in words is "twelve million, six hundred sixty thousand, four hundred twenty-five".