42755939 has 4 divisors (see below), whose sum is σ = 42771456. Its totient is φ = 42740424.

The previous prime is 42755897. The next prime is 42755953. The reversal of 42755939 is 93955724.

42755939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42755939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42755939.

It is not an unprimeable number, because it can be changed into a prime (42755959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2384 + ... + 9549.

It is an arithmetic number, because the mean of its divisors is an integer number (10692864).

Almost surely, 2^42755939 is an apocalyptic number.

42755939 is a deficient number, since it is larger than the sum of its proper divisors (15517).

42755939 is a wasteful number, since it uses less digits than its factorization.

42755939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15516.

The product of its digits is 340200, while the sum is 44.

The square root of 42755939 is about 6538.8025662196. The cubic root of 42755939 is about 349.6757241402.

The spelling of 42755939 in words is "forty-two million, seven hundred fifty-five thousand, nine hundred thirty-nine".