42420112 has 40 divisors (see below), whose sum is σ = 95349056. Its totient is φ = 17905536.

The previous prime is 42420109. The next prime is 42420181. The reversal of 42420112 is 21102424.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4678 + ... + 10330.

Almost surely, 2^42420112 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 42420112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47674528).

42420112 is an abundant number, since it is smaller than the sum of its proper divisors (52928944).

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

42420112 is a wasteful number, since it uses less digits than its factorization.

42420112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5735 (or 5729 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 42420112 is about 6513.0723932719. The cubic root of 42420112 is about 348.7578060371.

Adding to 42420112 its reverse (21102424), we get a palindrome (63522536).

The spelling of 42420112 in words is "forty-two million, four hundred twenty thousand, one hundred twelve".