42755817 has 20 divisors (see below), whose sum is σ = 61882000. Its totient is φ = 26258544.

The previous prime is 42755813. The next prime is 42755819. The reversal of 42755817 is 71855724.

42755817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42755817 - 2² = 42755813 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42755813) 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 19 ways as a sum of consecutive naturals, for example, 85434 + ... + 85932.

It is an arithmetic number, because the mean of its divisors is an integer number (3094100).

Almost surely, 2^42755817 is an apocalyptic number.

It is an amenable number.

42755817 is a deficient number, since it is larger than the sum of its proper divisors (19126183).

42755817 is an frugal number, since it uses more digits than its factorization.

42755817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554 (or 515 counting only the distinct ones).

The product of its digits is 78400, while the sum is 39.

The square root of 42755817 is about 6538.7932372877. The cubic root of 42755817 is about 349.6753915511.

The spelling of 42755817 in words is "forty-two million, seven hundred fifty-five thousand, eight hundred seventeen".