12641425 has 6 divisors (see below), whose sum is σ = 15675398. Its totient is φ = 10113120.

The previous prime is 12641411. The next prime is 12641429. The reversal of 12641425 is 52414621.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 258064 + 12383361 = 508^2 + 3519^2 .

It is not a de Polignac number, because 12641425 - 2⁷ = 12641297 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: 505657 = 12641425 / (1 + 2 + 6 + 4 + 1 + 4 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12641425.

It is not an unprimeable number, because it can be changed into a prime (12641429) 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, 252804 + ... + 252853.

Almost surely, 2^12641425 is an apocalyptic number.

It is an amenable number.

12641425 is a deficient number, since it is larger than the sum of its proper divisors (3033973).

12641425 is an equidigital number, since it uses as much as digits as its factorization.

12641425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505667 (or 505662 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 12641425 is about 3555.4781675606. The cubic root of 12641425 is about 232.9514103521.

The spelling of 12641425 in words is "twelve million, six hundred forty-one thousand, four hundred twenty-five".