12503312 has 20 divisors (see below), whose sum is σ = 24356700. Its totient is φ = 6217728.

The previous prime is 12503297. The next prime is 12503317. The reversal of 12503312 is 21330521.

It can be written as a sum of positive squares in 2 ways, for example, as 3041536 + 9461776 = 1744^2 + 3076^2 .

It is not an unprimeable number, because it can be changed into a prime (12503317) 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 3 ways as a sum of consecutive naturals, for example, 1064 + ... + 5112.

It is an arithmetic number, because the mean of its divisors is an integer number (1217835).

Almost surely, 2^12503312 is an apocalyptic number.

It is an amenable number.

12503312 is a deficient number, since it is larger than the sum of its proper divisors (11853388).

12503312 is a wasteful number, since it uses less digits than its factorization.

12503312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4250 (or 4244 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 12503312 is about 3536.0022624427. The cubic root of 12503312 is about 232.0999371269.

Adding to 12503312 its reverse (21330521), we get a palindrome (33833833).

The spelling of 12503312 in words is "twelve million, five hundred three thousand, three hundred twelve".