42100543 has 2 divisors, whose sum is σ = 42100544. Its totient is φ = 42100542.

The previous prime is 42100519. The next prime is 42100549. The reversal of 42100543 is 34500124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42100543 - 2⁹ = 42100031 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42100543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42100549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21050271 + 21050272.

It is an arithmetic number, because the mean of its divisors is an integer number (21050272).

Almost surely, 2^42100543 is an apocalyptic number.

42100543 is a deficient number, since it is larger than the sum of its proper divisors (1).

42100543 is an equidigital number, since it uses as much as digits as its factorization.

42100543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 42100543 is about 6488.4931224438. The cubic root of 42100543 is about 347.8798165823.

Adding to 42100543 its reverse (34500124), we get a palindrome (76600667).

The spelling of 42100543 in words is "forty-two million, one hundred thousand, five hundred forty-three".