42871186 has 4 divisors (see below), whose sum is σ = 64306782. Its totient is φ = 21435592.

The previous prime is 42871177. The next prime is 42871247. The reversal of 42871186 is 68117824.

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., 29365561 + 13505625 = 5419^2 + 3675^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 10717795 + ... + 10717798.

Almost surely, 2^42871186 is an apocalyptic number.

42871186 is a deficient number, since it is larger than the sum of its proper divisors (21435596).

42871186 is a wasteful number, since it uses less digits than its factorization.

42871186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21435595.

The product of its digits is 21504, while the sum is 37.

The square root of 42871186 is about 6547.6091819839. The cubic root of 42871186 is about 349.9896214610.

The spelling of 42871186 in words is "forty-two million, eight hundred seventy-one thousand, one hundred eighty-six".