42645375 has 24 divisors (see below), whose sum is σ = 76877424. Its totient is φ = 22743600.

The previous prime is 42645353. The next prime is 42645389. The reversal of 42645375 is 57354624.

42645375 is a `hidden beast` number, since 4 + 2 + 645 + 3 + 7 + 5 = 666.

It is not a de Polignac number, because 42645375 - 2²⁰ = 41596799 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17829 + ... + 20078.

It is an arithmetic number, because the mean of its divisors is an integer number (3203226).

Almost surely, 2^42645375 is an apocalyptic number.

42645375 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

42645375 is a deficient number, since it is larger than the sum of its proper divisors (34232049).

42645375 is a wasteful number, since it uses less digits than its factorization.

42645375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37928 (or 37915 counting only the distinct ones).

The product of its digits is 100800, while the sum is 36.

The square root of 42645375 is about 6530.3426403214. The cubic root of 42645375 is about 349.3740512731.

Adding to 42645375 its reverse (57354624), we get a palindrome (99999999).

The spelling of 42645375 in words is "forty-two million, six hundred forty-five thousand, three hundred seventy-five".