42564371 has 2 divisors, whose sum is σ = 42564372. Its totient is φ = 42564370.

The previous prime is 42564349. The next prime is 42564377. The reversal of 42564371 is 17346524.

42564371 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 42564371 - 2¹⁴ = 42547987 is a prime.

It is not a weakly prime, because it can be changed into another prime (42564377) 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, 21282185 + 21282186.

It is an arithmetic number, because the mean of its divisors is an integer number (21282186).

Almost surely, 2^42564371 is an apocalyptic number.

42564371 is a deficient number, since it is larger than the sum of its proper divisors (1).

42564371 is an equidigital number, since it uses as much as digits as its factorization.

42564371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 32.

The square root of 42564371 is about 6524.1375675257. The cubic root of 42564371 is about 349.1527014906.

The spelling of 42564371 in words is "forty-two million, five hundred sixty-four thousand, three hundred seventy-one".