42563771 has 4 divisors (see below), whose sum is σ = 42700944. Its totient is φ = 42426600.

The previous prime is 42563707. The next prime is 42563783. The reversal of 42563771 is 17736524.

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 42563771 - 2⁶ = 42563707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42563471) 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, 68120 + ... + 68741.

It is an arithmetic number, because the mean of its divisors is an integer number (10675236).

Almost surely, 2^42563771 is an apocalyptic number.

42563771 is a deficient number, since it is larger than the sum of its proper divisors (137173).

42563771 is a wasteful number, since it uses less digits than its factorization.

42563771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137172.

The product of its digits is 35280, while the sum is 35.

The square root of 42563771 is about 6524.0915842744. The cubic root of 42563771 is about 349.1510608962.

It can be divided in two parts, 42563 and 771, that added together give a palindrome (43334).

The spelling of 42563771 in words is "forty-two million, five hundred sixty-three thousand, seven hundred seventy-one".