42863971 has 4 divisors (see below), whose sum is σ = 42943744. Its totient is φ = 42784200.

The previous prime is 42863963. The next prime is 42863993. The reversal of 42863971 is 17936824.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42863971 - 2³ = 42863963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42863941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39075 + ... + 40156.

It is an arithmetic number, because the mean of its divisors is an integer number (10735936).

Almost surely, 2^42863971 is an apocalyptic number.

42863971 is a deficient number, since it is larger than the sum of its proper divisors (79773).

42863971 is an equidigital number, since it uses as much as digits as its factorization.

42863971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79772.

The product of its digits is 72576, while the sum is 40.

The square root of 42863971 is about 6547.0581943343. The cubic root of 42863971 is about 349.9699865420.

It can be divided in two parts, 42863 and 971, that added together give a palindrome (43834).

The spelling of 42863971 in words is "forty-two million, eight hundred sixty-three thousand, nine hundred seventy-one".