12581825 has 12 divisors (see below), whose sum is σ = 15645948. Its totient is φ = 10036800.

The previous prime is 12581797. The next prime is 12581827. The reversal of 12581825 is 52818521.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 4293184 + 8288641 = 2072^2 + 2879^2 .

It is not a de Polignac number, because 12581825 - 2¹² = 12577729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12581791 and 12581800.

It is not an unprimeable number, because it can be changed into a prime (12581827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14915 + ... + 15735.

It is an arithmetic number, because the mean of its divisors is an integer number (1303829).

Almost surely, 2^12581825 is an apocalyptic number.

It is an amenable number.

12581825 is a deficient number, since it is larger than the sum of its proper divisors (3064123).

12581825 is an equidigital number, since it uses as much as digits as its factorization.

12581825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1444 (or 1439 counting only the distinct ones).

The product of its digits is 6400, while the sum is 32.

The square root of 12581825 is about 3547.0868328813. The cubic root of 12581825 is about 232.5847380643.

The spelling of 12581825 in words is "twelve million, five hundred eighty-one thousand, eight hundred twenty-five".