42840112 has 60 divisors (see below), whose sum is σ = 98471376. Its totient is φ = 17996160.

The previous prime is 42840103. The next prime is 42840113. The reversal of 42840112 is 21104824.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (42840113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41037 + ... + 42067.

Almost surely, 2^42840112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42840112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49235688).

42840112 is an abundant number, since it is smaller than the sum of its proper divisors (55631264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42840112 is a wasteful number, since it uses less digits than its factorization.

42840112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106 (or 1093 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 42840112 is about 6545.2358246285. The cubic root of 42840112 is about 349.9050409055.

Adding to 42840112 its reverse (21104824), we get a palindrome (63944936).

The spelling of 42840112 in words is "forty-two million, eight hundred forty thousand, one hundred twelve".