42136866 has 12 divisors (see below), whose sum is σ = 91296582. Its totient is φ = 14045616.

The previous prime is 42136847. The next prime is 42136873. The reversal of 42136866 is 66863124.

It can be written as a sum of positive squares in only one way, i.e., 37638225 + 4498641 = 6135^2 + 2121^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 42136866.

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 in 5 ways as a sum of consecutive naturals, for example, 1170451 + ... + 1170486.

Almost surely, 2^42136866 is an apocalyptic number.

42136866 is an abundant number, since it is smaller than the sum of its proper divisors (49159716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42136866 is a wasteful number, since it uses less digits than its factorization.

42136866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2340945 (or 2340942 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 42136866 is about 6491.2915509935. The cubic root of 42136866 is about 347.9798343448.

The spelling of 42136866 in words is "forty-two million, one hundred thirty-six thousand, eight hundred sixty-six".