42543907 has 12 divisors (see below), whose sum is σ = 52095720. Its totient is φ = 34546176.

The previous prime is 42543881. The next prime is 42543931. The reversal of 42543907 is 70934524.

It is a de Polignac number, because none of the positive numbers 2^k-42543907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42543947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21918 + ... + 23779.

It is an arithmetic number, because the mean of its divisors is an integer number (4341310).

Almost surely, 2^42543907 is an apocalyptic number.

42543907 is a deficient number, since it is larger than the sum of its proper divisors (9551813).

42543907 is a wasteful number, since it uses less digits than its factorization.

42543907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45730 (or 45723 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 42543907 is about 6522.5690490787. The cubic root of 42543907 is about 349.0967375777.

The spelling of 42543907 in words is "forty-two million, five hundred forty-three thousand, nine hundred seven".