42171082 has 4 divisors (see below), whose sum is σ = 63256626. Its totient is φ = 21085540.

The previous prime is 42171061. The next prime is 42171091. The reversal of 42171082 is 28017124.

It is a happy number.

42171082 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 40208281 + 1962801 = 6341^2 + 1401^2 .

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 as a sum of consecutive naturals, namely, 10542769 + ... + 10542772.

Almost surely, 2^42171082 is an apocalyptic number.

42171082 is a deficient number, since it is larger than the sum of its proper divisors (21085544).

42171082 is a wasteful number, since it uses less digits than its factorization.

42171082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21085543.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 42171082 is about 6493.9265471670. The cubic root of 42171082 is about 348.0739977843.

The spelling of 42171082 in words is "forty-two million, one hundred seventy-one thousand, eighty-two".