42181671 has 16 divisors (see below), whose sum is σ = 64371200. Its totient is φ = 24068448.

The previous prime is 42181627. The next prime is 42181673. The reversal of 42181671 is 17618124.

It is not a de Polignac number, because 42181671 - 2⁷ = 42181543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42181673) 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 in 15 ways as a sum of consecutive naturals, for example, 21510 + ... + 23388.

It is an arithmetic number, because the mean of its divisors is an integer number (4023200).

Almost surely, 2^42181671 is an apocalyptic number.

42181671 is a deficient number, since it is larger than the sum of its proper divisors (22189529).

42181671 is a wasteful number, since it uses less digits than its factorization.

42181671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2958.

The product of its digits is 2688, while the sum is 30.

The square root of 42181671 is about 6494.7417962533. The cubic root of 42181671 is about 348.1031287032.

Adding to 42181671 its reverse (17618124), we get a palindrome (59799795).

The spelling of 42181671 in words is "forty-two million, one hundred eighty-one thousand, six hundred seventy-one".