42563971 has 8 divisors (see below), whose sum is σ = 47440080. Its totient is φ = 37951488.

The previous prime is 42563959. The next prime is 42563981. The reversal of 42563971 is 17936524.

42563971 is nontrivially palindromic in base 13.

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 42563971 - 2⁹ = 42563459 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42563971.

It is not an unprimeable number, because it can be changed into a prime (42563921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65566 + ... + 66211.

It is an arithmetic number, because the mean of its divisors is an integer number (5930010).

Almost surely, 2^42563971 is an apocalyptic number.

42563971 is a deficient number, since it is larger than the sum of its proper divisors (4876109).

42563971 is a wasteful number, since it uses less digits than its factorization.

42563971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131813.

The product of its digits is 45360, while the sum is 37.

The square root of 42563971 is about 6524.1069120608. The cubic root of 42563971 is about 349.1516077627.

It can be divided in two parts, 42563 and 971, that added together give a palindrome (43534).

The spelling of 42563971 in words is "forty-two million, five hundred sixty-three thousand, nine hundred seventy-one".