42056771 has 8 divisors (see below), whose sum is σ = 42957504. Its totient is φ = 41164200.

The previous prime is 42056767. The next prime is 42056783. The reversal of 42056771 is 17765024.

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

It is a cyclic number.

It is not a de Polignac number, because 42056771 - 2² = 42056767 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42056711) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 8996 + ... + 12846.

It is an arithmetic number, because the mean of its divisors is an integer number (5369688).

Almost surely, 2^42056771 is an apocalyptic number.

42056771 is a deficient number, since it is larger than the sum of its proper divisors (900733).

42056771 is a wasteful number, since it uses less digits than its factorization.

42056771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4081.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 42056771 is about 6485.1191970541. The cubic root of 42056771 is about 347.7592110460.

The spelling of 42056771 in words is "forty-two million, fifty-six thousand, seven hundred seventy-one".