42342247 has 2 divisors, whose sum is σ = 42342248. Its totient is φ = 42342246.

The previous prime is 42342239. The next prime is 42342277. The reversal of 42342247 is 74224324.

42342247 is digitally balanced in base 2, 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 42342247 - 2³ = 42342239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42342277) 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, 21171123 + 21171124.

It is an arithmetic number, because the mean of its divisors is an integer number (21171124).

Almost surely, 2^42342247 is an apocalyptic number.

42342247 is a deficient number, since it is larger than the sum of its proper divisors (1).

42342247 is an equidigital number, since it uses as much as digits as its factorization.

42342247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 28.

The square root of 42342247 is about 6507.0920540592. The cubic root of 42342247 is about 348.5442857843.

The spelling of 42342247 in words is "forty-two million, three hundred forty-two thousand, two hundred forty-seven".