12458521 has 2 divisors, whose sum is σ = 12458522. Its totient is φ = 12458520.

The previous prime is 12458513. The next prime is 12458527. The reversal of 12458521 is 12585421.

12458521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12390400 + 68121 = 3520^2 + 261^2 .

It is an emirp because it is prime and its reverse (12585421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12458521 - 2³ = 12458513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12458521.

It is not a weakly prime, because it can be changed into another prime (12458527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6229260 + 6229261.

It is an arithmetic number, because the mean of its divisors is an integer number (6229261).

Almost surely, 2^12458521 is an apocalyptic number.

It is an amenable number.

12458521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12458521 is an equidigital number, since it uses as much as digits as its factorization.

12458521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3200, while the sum is 28.

The square root of 12458521 is about 3529.6630150767. The cubic root of 12458521 is about 231.8224525957.

The spelling of 12458521 in words is "twelve million, four hundred fifty-eight thousand, five hundred twenty-one".