12925721 has 2 divisors, whose sum is σ = 12925722. Its totient is φ = 12925720.

The previous prime is 12925709. The next prime is 12925733. The reversal of 12925721 is 12752921.

12925721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (12925709) and next prime (12925733).

It can be written as a sum of positive squares in only one way, i.e., 8620096 + 4305625 = 2936^2 + 2075^2 .

It is an emirp because it is prime and its reverse (12752921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12925721 - 2¹⁸ = 12663577 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12925741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6462860 + 6462861.

It is an arithmetic number, because the mean of its divisors is an integer number (6462861).

Almost surely, 2^12925721 is an apocalyptic number.

It is an amenable number.

12925721 is a deficient number, since it is larger than the sum of its proper divisors (1).

12925721 is an equidigital number, since it uses as much as digits as its factorization.

12925721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 29.

The square root of 12925721 is about 3595.2358754329. The cubic root of 12925721 is about 234.6847803235.

The spelling of 12925721 in words is "twelve million, nine hundred twenty-five thousand, seven hundred twenty-one".