42823971 has 10 divisors (see below), whose sum is σ = 63971732. Its totient is φ = 28549260.

The previous prime is 42823961. The next prime is 42823997. The reversal of 42823971 is 17932824.

It is not a de Polignac number, because 42823971 - 2⁵ = 42823939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42823931) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 264265 + ... + 264426.

Almost surely, 2^42823971 is an apocalyptic number.

42823971 is a deficient number, since it is larger than the sum of its proper divisors (21147761).

42823971 is an equidigital number, since it uses as much as digits as its factorization.

42823971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528703 (or 528694 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 42823971 is about 6544.0026742048. The cubic root of 42823971 is about 349.8610904545.

The spelling of 42823971 in words is "forty-two million, eight hundred twenty-three thousand, nine hundred seventy-one".