42388543 has 2 divisors, whose sum is σ = 42388544. Its totient is φ = 42388542.

The previous prime is 42388529. The next prime is 42388559. The reversal of 42388543 is 34588324.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42388543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42388513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21194271 + 21194272.

It is an arithmetic number, because the mean of its divisors is an integer number (21194272).

Almost surely, 2^42388543 is an apocalyptic number.

42388543 is a deficient number, since it is larger than the sum of its proper divisors (1).

42388543 is an equidigital number, since it uses as much as digits as its factorization.

42388543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92160, while the sum is 37.

The square root of 42388543 is about 6510.6484316080. The cubic root of 42388543 is about 348.6712695101.

The spelling of 42388543 in words is "forty-two million, three hundred eighty-eight thousand, five hundred forty-three".