42543827 has 2 divisors, whose sum is σ = 42543828. Its totient is φ = 42543826.

The previous prime is 42543817. The next prime is 42543829. The reversal of 42543827 is 72834524.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42543827 is a prime.

Together with 42543829, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42543829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21271913 + 21271914.

It is an arithmetic number, because the mean of its divisors is an integer number (21271914).

Almost surely, 2^42543827 is an apocalyptic number.

42543827 is a deficient number, since it is larger than the sum of its proper divisors (1).

42543827 is an equidigital number, since it uses as much as digits as its factorization.

42543827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 35.

The square root of 42543827 is about 6522.5629165229. The cubic root of 42543827 is about 349.0965187625.

The spelling of 42543827 in words is "forty-two million, five hundred forty-three thousand, eight hundred twenty-seven".