42840755 has 8 divisors (see below), whose sum is σ = 51447312. Its totient is φ = 34247008.

The previous prime is 42840751. The next prime is 42840757. The reversal of 42840755 is 55704824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42840755 - 2² = 42840751 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42840751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7289 + ... + 11781.

It is an arithmetic number, because the mean of its divisors is an integer number (6430914).

Almost surely, 2^42840755 is an apocalyptic number.

42840755 is a deficient number, since it is larger than the sum of its proper divisors (8606557).

42840755 is a wasteful number, since it uses less digits than its factorization.

42840755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6405.

The product of its (nonzero) digits is 44800, while the sum is 35.

The square root of 42840755 is about 6545.2849441411. The cubic root of 42840755 is about 349.9067915064.

The spelling of 42840755 in words is "forty-two million, eight hundred forty thousand, seven hundred fifty-five".