642443112 has 48 divisors (see below), whose sum is σ = 1750041540. Its totient is φ = 212905728.

The previous prime is 642443093. The next prime is 642443159. The reversal of 642443112 is 211344246.

It is a happy number.

642443112 is a `hidden beast` number, since 642 + 4 + 4 + 3 + 1 + 12 = 666.

642443112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 601917156 + 40525956 = 24534^2 + 6366^2 .

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13333 + ... + 38244.

Almost surely, 2^642443112 is an apocalyptic number.

It is an amenable number.

642443112 is an abundant number, since it is smaller than the sum of its proper divisors (1107598428).

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

642443112 is a wasteful number, since it uses less digits than its factorization.

642443112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51762 (or 51755 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 642443112 is about 25346.4615281897. The cubic root of 642443112 is about 862.8690513914.

Adding to 642443112 its reverse (211344246), we get a palindrome (853787358).

The spelling of 642443112 in words is "six hundred forty-two million, four hundred forty-three thousand, one hundred twelve".