42665134 has 4 divisors (see below), whose sum is σ = 63997704. Its totient is φ = 21332566.

The previous prime is 42665113. The next prime is 42665137. The reversal of 42665134 is 43156624.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 42665096 and 42665105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42665137) 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 as a sum of consecutive naturals, namely, 10666282 + ... + 10666285.

It is an arithmetic number, because the mean of its divisors is an integer number (15999426).

Almost surely, 2^42665134 is an apocalyptic number.

42665134 is a deficient number, since it is larger than the sum of its proper divisors (21332570).

42665134 is a wasteful number, since it uses less digits than its factorization.

42665134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21332569.

The product of its digits is 17280, while the sum is 31.

The square root of 42665134 is about 6531.8553260157. The cubic root of 42665134 is about 349.4280017580.

The spelling of 42665134 in words is "forty-two million, six hundred sixty-five thousand, one hundred thirty-four".