42171715 has 8 divisors (see below), whose sum is σ = 50647968. Its totient is φ = 33709440.

The previous prime is 42171707. The next prime is 42171721. The reversal of 42171715 is 51717124.

42171715 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42171715 - 2³ = 42171707 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5050 + ... + 10480.

It is an arithmetic number, because the mean of its divisors is an integer number (6330996).

Almost surely, 2^42171715 is an apocalyptic number.

42171715 is a deficient number, since it is larger than the sum of its proper divisors (8476253).

42171715 is a wasteful number, since it uses less digits than its factorization.

42171715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6989.

The product of its digits is 1960, while the sum is 28.

The square root of 42171715 is about 6493.9752848313. The cubic root of 42171715 is about 348.0757393390.

Adding to 42171715 its reverse (51717124), we get a palindrome (93888839).

The spelling of 42171715 in words is "forty-two million, one hundred seventy-one thousand, seven hundred fifteen".