42937186 has 4 divisors (see below), whose sum is σ = 64405782. Its totient is φ = 21468592.

The previous prime is 42937183. The next prime is 42937199. The reversal of 42937186 is 68173924.

42937186 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., 33419961 + 9517225 = 5781^2 + 3085^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (42937183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10734295 + ... + 10734298.

Almost surely, 2^42937186 is an apocalyptic number.

42937186 is a deficient number, since it is larger than the sum of its proper divisors (21468596).

42937186 is a wasteful number, since it uses less digits than its factorization.

42937186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21468595.

The product of its digits is 72576, while the sum is 40.

The square root of 42937186 is about 6552.6472513023. The cubic root of 42937186 is about 350.1691318620.

The spelling of 42937186 in words is "forty-two million, nine hundred thirty-seven thousand, one hundred eighty-six".