12542067621 has 12 divisors (see below), whose sum is σ = 18787295072. Its totient is φ = 8361378252.

The previous prime is 12542067607. The next prime is 12542067623. The reversal of 12542067621 is 12676024521.

It is a happy number.

12542067621 is a `hidden beast` number, since 1 + 2 + 5 + 4 + 20 + 6 + 7 + 621 = 666.

12542067621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12542067621 - 2¹⁴ = 12542051237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12542067623) 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 in 11 ways as a sum of consecutive naturals, for example, 25806481 + ... + 25806966.

Almost surely, 2^12542067621 is an apocalyptic number.

It is an amenable number.

12542067621 is a deficient number, since it is larger than the sum of its proper divisors (6245227451).

12542067621 is an frugal number, since it uses more digits than its factorization.

12542067621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51613462 (or 51613450 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 12542067621 in words is "twelve billion, five hundred forty-two million, sixty-seven thousand, six hundred twenty-one".