12420563 has 4 divisors (see below), whose sum is σ = 12463248. Its totient is φ = 12377880.

The previous prime is 12420521. The next prime is 12420571. The reversal of 12420563 is 36502421.

12420563 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12420563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12420263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20903 + ... + 21488.

It is an arithmetic number, because the mean of its divisors is an integer number (3115812).

Almost surely, 2^12420563 is an apocalyptic number.

12420563 is a deficient number, since it is larger than the sum of its proper divisors (42685).

12420563 is an equidigital number, since it uses as much as digits as its factorization.

12420563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42684.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 12420563 is about 3524.2819126738. The cubic root of 12420563 is about 231.5867780600.

Adding to 12420563 its reverse (36502421), we get a palindrome (48922984).

The spelling of 12420563 in words is "twelve million, four hundred twenty thousand, five hundred sixty-three".