42102171 has 24 divisors (see below), whose sum is σ = 63598080. Its totient is φ = 26804736.

The previous prime is 42102161. The next prime is 42102173. The reversal of 42102171 is 17120124.

42102171 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42102171 - 2⁶ = 42102107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42102173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24486 + ... + 26148.

It is an arithmetic number, because the mean of its divisors is an integer number (2649920).

Almost surely, 2^42102171 is an apocalyptic number.

42102171 is a deficient number, since it is larger than the sum of its proper divisors (21495909).

42102171 is a wasteful number, since it uses less digits than its factorization.

42102171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795 (or 1792 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 42102171 is about 6488.6185740880. The cubic root of 42102171 is about 347.8843006182.

Adding to 42102171 its reverse (17120124), we get a palindrome (59222295).

The spelling of 42102171 in words is "forty-two million, one hundred two thousand, one hundred seventy-one".