42156730 has 64 divisors (see below), whose sum is σ = 96484608. Its totient is φ = 12879360.

The previous prime is 42156721. The next prime is 42156773. The reversal of 42156730 is 3765124.

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 31 ways as a sum of consecutive naturals, for example, 40294 + ... + 41326.

It is an arithmetic number, because the mean of its divisors is an integer number (1507572).

Almost surely, 2^42156730 is an apocalyptic number.

42156730 is an abundant number, since it is smaller than the sum of its proper divisors (54327878).

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

42156730 is a wasteful number, since it uses less digits than its factorization.

42156730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 42156730 is about 6492.8214206152. The cubic root of 42156730 is about 348.0345068614.

The spelling of 42156730 in words is "forty-two million, one hundred fifty-six thousand, seven hundred thirty".