12420887 has 2 divisors, whose sum is σ = 12420888. Its totient is φ = 12420886.

The previous prime is 12420871. The next prime is 12420917. The reversal of 12420887 is 78802421.

12420887 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 is a cyclic number.

It is not a de Polignac number, because 12420887 - 2⁴ = 12420871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12420487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6210443 + 6210444.

It is an arithmetic number, because the mean of its divisors is an integer number (6210444).

Almost surely, 2^12420887 is an apocalyptic number.

12420887 is a deficient number, since it is larger than the sum of its proper divisors (1).

12420887 is an equidigital number, since it uses as much as digits as its factorization.

12420887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 12420887 is about 3524.3278791849. The cubic root of 12420887 is about 231.5887917493.

The spelling of 12420887 in words is "twelve million, four hundred twenty thousand, eight hundred eighty-seven".