12505408 has 28 divisors (see below), whose sum is σ = 25490932. Its totient is φ = 6082560.

The previous prime is 12505393. The next prime is 12505417. The reversal of 12505408 is 80450521.

It can be written as a sum of positive squares in 2 ways, for example, as 6512704 + 5992704 = 2552^2 + 2448^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 273 + ... + 5008.

Almost surely, 2^12505408 is an apocalyptic number.

It is an amenable number.

12505408 is an abundant number, since it is smaller than the sum of its proper divisors (12985524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12505408 is an equidigital number, since it uses as much as digits as its factorization.

12505408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5330 (or 5320 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 12505408 is about 3536.2986299237. The cubic root of 12505408 is about 232.1129058050.

Adding to 12505408 its reverse (80450521), we get a palindrome (92955929).

It can be divided in two parts, 1250 and 5408, that multiplied together give a square (6760000 = 2600²).

The spelling of 12505408 in words is "twelve million, five hundred five thousand, four hundred eight".