42138075 has 24 divisors (see below), whose sum is σ = 79621888. Its totient is φ = 19262880.

The previous prime is 42138059. The next prime is 42138077. The reversal of 42138075 is 57083124.

It is not a de Polignac number, because 42138075 - 2⁴ = 42138059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42138077) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39607 + ... + 40656.

Almost surely, 2^42138075 is an apocalyptic number.

42138075 is a deficient number, since it is larger than the sum of its proper divisors (37483813).

42138075 is a wasteful number, since it uses less digits than its factorization.

42138075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80283 (or 80278 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 42138075 is about 6491.3846750905. The cubic root of 42138075 is about 347.9831624169.

The spelling of 42138075 in words is "forty-two million, one hundred thirty-eight thousand, seventy-five".