42111071 has 2 divisors, whose sum is σ = 42111072. Its totient is φ = 42111070.

The previous prime is 42111053. The next prime is 42111077. The reversal of 42111071 is 17011124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42111071 - 2⁶ = 42111007 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42111077) 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, 21055535 + 21055536.

It is an arithmetic number, because the mean of its divisors is an integer number (21055536).

Almost surely, 2^42111071 is an apocalyptic number.

42111071 is a deficient number, since it is larger than the sum of its proper divisors (1).

42111071 is an equidigital number, since it uses as much as digits as its factorization.

42111071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 42111071 is about 6489.3043540891. The cubic root of 42111071 is about 347.9088120394.

Adding to 42111071 its reverse (17011124), we get a palindrome (59122195).

The spelling of 42111071 in words is "forty-two million, one hundred eleven thousand, seventy-one".