42869855 has 20 divisors (see below), whose sum is σ = 60031032. Its totient is φ = 29388240.

The previous prime is 42869851. The next prime is 42869857. The reversal of 42869855 is 55896824.

42869855 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 42869855 - 2² = 42869851 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42869851) 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, 10220 + ... + 13790.

Almost surely, 2^42869855 is an apocalyptic number.

42869855 is a deficient number, since it is larger than the sum of its proper divisors (17161177).

42869855 is an frugal number, since it uses more digits than its factorization.

42869855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3604 (or 3583 counting only the distinct ones).

The product of its digits is 691200, while the sum is 47.

The square root of 42869855 is about 6547.5075410419. The cubic root of 42869855 is about 349.9859994400.

It can be divided in two parts, 4286 and 9855, that added together give a palindrome (14141).

The spelling of 42869855 in words is "forty-two million, eight hundred sixty-nine thousand, eight hundred fifty-five".