42543041 has 2 divisors, whose sum is σ = 42543042. Its totient is φ = 42543040.

The previous prime is 42542977. The next prime is 42543043. The reversal of 42543041 is 14034524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42523441 + 19600 = 6521^2 + 140^2 .

It is a cyclic number.

It is not a de Polignac number, because 42543041 - 2⁶ = 42542977 is a prime.

Together with 42543043, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 42542998 and 42543016.

It is not a weakly prime, because it can be changed into another prime (42543043) 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 as a sum of consecutive naturals, namely, 21271520 + 21271521.

It is an arithmetic number, because the mean of its divisors is an integer number (21271521).

Almost surely, 2^42543041 is an apocalyptic number.

It is an amenable number.

42543041 is a deficient number, since it is larger than the sum of its proper divisors (1).

42543041 is an equidigital number, since it uses as much as digits as its factorization.

42543041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 42543041 is about 6522.5026638553. The cubic root of 42543041 is about 349.0943688889.

Adding to 42543041 its reverse (14034524), we get a palindrome (56577565).

The spelling of 42543041 in words is "forty-two million, five hundred forty-three thousand, forty-one".