12501321 has 16 divisors (see below), whose sum is σ = 19440000. Its totient is φ = 7143024.

The previous prime is 12501317. The next prime is 12501331. The reversal of 12501321 is 12310521.

12501321 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12501321 - 2² = 12501317 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12501321.

It is not an unprimeable number, because it can be changed into a prime (12501311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5046 + ... + 7103.

It is an arithmetic number, because the mean of its divisors is an integer number (1215000).

Almost surely, 2^12501321 is an apocalyptic number.

It is an amenable number.

12501321 is a deficient number, since it is larger than the sum of its proper divisors (6938679).

12501321 is an equidigital number, since it uses as much as digits as its factorization.

12501321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12173 (or 12159 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 12501321 is about 3535.7207186089. The cubic root of 12501321 is about 232.0876167778.

Adding to 12501321 its reverse (12310521), we get a palindrome (24811842).

The spelling of 12501321 in words is "twelve million, five hundred one thousand, three hundred twenty-one".