12654721 has 2 divisors, whose sum is σ = 12654722. Its totient is φ = 12654720.

The previous prime is 12654713. The next prime is 12654737. The reversal of 12654721 is 12745621.

12654721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9641025 + 3013696 = 3105^2 + 1736^2 .

It is a cyclic number.

It is not a de Polignac number, because 12654721 - 2³ = 12654713 is a prime.

It is a Chen prime.

It is equal to p₈₂₈₁₅₄ and since 12654721 and 828154 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12654721.

It is not a weakly prime, because it can be changed into another prime (12654751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6327360 + 6327361.

It is an arithmetic number, because the mean of its divisors is an integer number (6327361).

Almost surely, 2^12654721 is an apocalyptic number.

It is an amenable number.

12654721 is a deficient number, since it is larger than the sum of its proper divisors (1).

12654721 is an equidigital number, since it uses as much as digits as its factorization.

12654721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 28.

The square root of 12654721 is about 3557.3474668635. The cubic root of 12654721 is about 233.0330529592.

The spelling of 12654721 in words is "twelve million, six hundred fifty-four thousand, seven hundred twenty-one".