42171946 has 8 divisors (see below), whose sum is σ = 63308484. Its totient is φ = 21069120.

The previous prime is 42171929. The next prime is 42171947. The reversal of 42171946 is 64917124.

42171946 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 33698025 + 8473921 = 5805^2 + 2911^2 .

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

It is not an unprimeable number, because it can be changed into a prime (42171947) 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 3 ways as a sum of consecutive naturals, for example, 5025 + ... + 10468.

Almost surely, 2^42171946 is an apocalyptic number.

42171946 is a deficient number, since it is larger than the sum of its proper divisors (21136538).

42171946 is a wasteful number, since it uses less digits than its factorization.

42171946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16856.

The product of its digits is 12096, while the sum is 34.

The square root of 42171946 is about 6493.9930705229. The cubic root of 42171946 is about 348.0763748783.

The spelling of 42171946 in words is "forty-two million, one hundred seventy-one thousand, nine hundred forty-six".