42665145 has 16 divisors (see below), whose sum is σ = 70467072. Its totient is φ = 22020480.

The previous prime is 42665141. The next prime is 42665171. The reversal of 42665145 is 54156624.

It is not a de Polignac number, because 42665145 - 2² = 42665141 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42665141) 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 15 ways as a sum of consecutive naturals, for example, 45412 + ... + 46341.

It is an arithmetic number, because the mean of its divisors is an integer number (4404192).

Almost surely, 2^42665145 is an apocalyptic number.

It is an amenable number.

42665145 is a deficient number, since it is larger than the sum of its proper divisors (27801927).

42665145 is a wasteful number, since it uses less digits than its factorization.

42665145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91792.

The product of its digits is 28800, while the sum is 33.

The square root of 42665145 is about 6531.8561680429. The cubic root of 42665145 is about 349.4280317880.

The spelling of 42665145 in words is "forty-two million, six hundred sixty-five thousand, one hundred forty-five".