42128056 has 16 divisors (see below), whose sum is σ = 79394040. Its totient is φ = 20956320.

The previous prime is 42128041. The next prime is 42128069. The reversal of 42128056 is 65082124.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 11790 + ... + 14941.

Almost surely, 2^42128056 is an apocalyptic number.

It is an amenable number.

42128056 is a deficient number, since it is larger than the sum of its proper divisors (37265984).

42128056 is a wasteful number, since it uses less digits than its factorization.

42128056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26934 (or 26930 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 42128056 is about 6490.6129140475. The cubic root of 42128056 is about 347.9555807135.

The spelling of 42128056 in words is "forty-two million, one hundred twenty-eight thousand, fifty-six".