42771843 has 12 divisors (see below), whose sum is σ = 61877920. Its totient is φ = 28470096.

The previous prime is 42771823. The next prime is 42771857. The reversal of 42771843 is 34817724.

It is a happy number.

It is not a de Polignac number, because 42771843 - 2⁸ = 42771587 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 42771798 and 42771807.

It is not an unprimeable number, because it can be changed into a prime (42771803) 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 11 ways as a sum of consecutive naturals, for example, 3030 + ... + 9732.

Almost surely, 2^42771843 is an apocalyptic number.

42771843 is a deficient number, since it is larger than the sum of its proper divisors (19106077).

42771843 is a wasteful number, since it uses less digits than its factorization.

42771843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7418 (or 7415 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 42771843 is about 6540.0185779553. The cubic root of 42771843 is about 349.7190752586.

The spelling of 42771843 in words is "forty-two million, seven hundred seventy-one thousand, eight hundred forty-three".