42408647 has 2 divisors, whose sum is σ = 42408648. Its totient is φ = 42408646.

The previous prime is 42408631. The next prime is 42408649. The reversal of 42408647 is 74680424.

42408647 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 is a cyclic number.

It is not a de Polignac number, because 42408647 - 2⁴ = 42408631 is a prime.

Together with 42408649, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42408649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21204323 + 21204324.

It is an arithmetic number, because the mean of its divisors is an integer number (21204324).

Almost surely, 2^42408647 is an apocalyptic number.

42408647 is a deficient number, since it is larger than the sum of its proper divisors (1).

42408647 is an equidigital number, since it uses as much as digits as its factorization.

42408647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 35.

The square root of 42408647 is about 6512.1921808251. The cubic root of 42408647 is about 348.7263832965.

The spelling of 42408647 in words is "forty-two million, four hundred eight thousand, six hundred forty-seven".