12508321 has 12 divisors (see below), whose sum is σ = 14666176. Its totient is φ = 10450080.

The previous prime is 12508267. The next prime is 12508337. The reversal of 12508321 is 12380521.

It is a de Polignac number, because none of the positive numbers 2^k-12508321 is a prime.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 12508292 and 12508301.

It is not an unprimeable number, because it can be changed into a prime (12508351) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11236 + ... + 12298.

Almost surely, 2^12508321 is an apocalyptic number.

It is an amenable number.

12508321 is a deficient number, since it is larger than the sum of its proper divisors (2157855).

12508321 is an equidigital number, since it uses as much as digits as its factorization.

12508321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152 (or 1111 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 12508321 is about 3536.7104772656. The cubic root of 12508321 is about 232.1309271390.

Adding to 12508321 its reverse (12380521), we get a palindrome (24888842).

The spelling of 12508321 in words is "twelve million, five hundred eight thousand, three hundred twenty-one".