42742056 has 128 divisors (see below), whose sum is σ = 130867200. Its totient is φ = 11370240.

The previous prime is 42742031. The next prime is 42742069. The reversal of 42742056 is 65024724.

It is a super-2 number, since 2×42742056² = 3653766702214272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150891 + ... + 151173.

It is an arithmetic number, because the mean of its divisors is an integer number (1022400).

Almost surely, 2^42742056 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 42742056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65433600).

42742056 is an abundant number, since it is smaller than the sum of its proper divisors (88125144).

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

42742056 is a wasteful number, since it uses less digits than its factorization.

42742056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359 (or 355 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 42742056 is about 6537.7408942233. The cubic root of 42742056 is about 349.6378730742.

The spelling of 42742056 in words is "forty-two million, seven hundred forty-two thousand, fifty-six".