64140042 has 8 divisors (see below), whose sum is σ = 128280096. Its totient is φ = 21380012.

The previous prime is 64140019. The next prime is 64140059. The reversal of 64140042 is 24004146.

64140042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

64140042 is an admirable number.

It is a super-2 number, since 2×64140042² = 8227889975523528, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5344998 + ... + 5345009.

It is an arithmetic number, because the mean of its divisors is an integer number (16035012).

Almost surely, 2^64140042 is an apocalyptic number.

64140042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

64140042 is a wasteful number, since it uses less digits than its factorization.

64140042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10690012.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 64140042 is about 8008.7478422035. The cubic root of 64140042 is about 400.2915416237.

Adding to 64140042 its reverse (24004146), we get a palindrome (88144188).

The spelling of 64140042 in words is "sixty-four million, one hundred forty thousand, forty-two".