12540653 has 2 divisors, whose sum is σ = 12540654. Its totient is φ = 12540652.

The previous prime is 12540641. The next prime is 12540667. The reversal of 12540653 is 35604521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12482089 + 58564 = 3533^2 + 242^2 .

It is a cyclic number.

It is not a de Polignac number, because 12540653 - 2⁸ = 12540397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12540623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6270326 + 6270327.

It is an arithmetic number, because the mean of its divisors is an integer number (6270327).

Almost surely, 2^12540653 is an apocalyptic number.

It is an amenable number.

12540653 is a deficient number, since it is larger than the sum of its proper divisors (1).

12540653 is an equidigital number, since it uses as much as digits as its factorization.

12540653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 12540653 is about 3541.2784414671. The cubic root of 12540653 is about 232.3307621069.

The spelling of 12540653 in words is "twelve million, five hundred forty thousand, six hundred fifty-three".