12506128 has 10 divisors (see below), whose sum is σ = 24230654. Its totient is φ = 6253056.

The previous prime is 12506083. The next prime is 12506147. The reversal of 12506128 is 82160521.

It can be written as a sum of positive squares in only one way, i.e., 11916304 + 589824 = 3452^2 + 768^2 .

It is a super-3 number, since 3×12506128³ (a number of 22 digits) contains 333 as substring.

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 as a sum of consecutive naturals, namely, 390801 + ... + 390832.

Almost surely, 2^12506128 is an apocalyptic number.

It is an amenable number.

12506128 is a deficient number, since it is larger than the sum of its proper divisors (11724526).

12506128 is an equidigital number, since it uses as much as digits as its factorization.

12506128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781641 (or 781635 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 12506128 is about 3536.4004298156. The cubic root of 12506128 is about 232.1173603601.

Adding to 12506128 its reverse (82160521), we get a palindrome (94666649).

The spelling of 12506128 in words is "twelve million, five hundred six thousand, one hundred twenty-eight".