42001171 has 2 divisors, whose sum is σ = 42001172. Its totient is φ = 42001170.

The previous prime is 42001117. The next prime is 42001189. The reversal of 42001171 is 17110024.

Together with previous prime (42001117) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42001171 - 2¹¹ = 41999123 is a prime.

It is a super-3 number, since 3×42001171³ (a number of 24 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (42001471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21000585 + 21000586.

It is an arithmetic number, because the mean of its divisors is an integer number (21000586).

Almost surely, 2^42001171 is an apocalyptic number.

42001171 is a deficient number, since it is larger than the sum of its proper divisors (1).

42001171 is an equidigital number, since it uses as much as digits as its factorization.

42001171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 42001171 is about 6480.8310423895. The cubic root of 42001171 is about 347.6058949564.

Adding to 42001171 its reverse (17110024), we get a palindrome (59111195).

The spelling of 42001171 in words is "forty-two million, one thousand, one hundred seventy-one".