42137866 has 16 divisors (see below), whose sum is σ = 69085440. Its totient is φ = 19189440.

The previous prime is 42137831. The next prime is 42137869. The reversal of 42137866 is 66873124.

It is not an unprimeable number, because it can be changed into a prime (42137869) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 18936 + ... + 21043.

It is an arithmetic number, because the mean of its divisors is an integer number (4317840).

Almost surely, 2^42137866 is an apocalyptic number.

42137866 is a deficient number, since it is larger than the sum of its proper divisors (26947574).

42137866 is a wasteful number, since it uses less digits than its factorization.

42137866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40029.

The product of its digits is 48384, while the sum is 37.

The square root of 42137866 is about 6491.3685768103. The cubic root of 42137866 is about 347.9825870972.

The spelling of 42137866 in words is "forty-two million, one hundred thirty-seven thousand, eight hundred sixty-six".