42156788 has 12 divisors (see below), whose sum is σ = 73823652. Its totient is φ = 21064320.

The previous prime is 42156773. The next prime is 42156799. The reversal of 42156788 is 88765124.

It can be written as a sum of positive squares in 2 ways, for example, as 18905104 + 23251684 = 4348^2 + 4822^2 .

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, 6206 + ... + 11082.

It is an arithmetic number, because the mean of its divisors is an integer number (6151971).

Almost surely, 2^42156788 is an apocalyptic number.

It is an amenable number.

42156788 is a deficient number, since it is larger than the sum of its proper divisors (31666864).

42156788 is a wasteful number, since it uses less digits than its factorization.

42156788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7042 (or 7040 counting only the distinct ones).

The product of its digits is 107520, while the sum is 41.

The square root of 42156788 is about 6492.8258870849. The cubic root of 42156788 is about 348.0346664721.

The spelling of 42156788 in words is "forty-two million, one hundred fifty-six thousand, seven hundred eighty-eight".