42771871 has 4 divisors (see below), whose sum is σ = 43011000. Its totient is φ = 42532744.

The previous prime is 42771857. The next prime is 42771913. The reversal of 42771871 is 17817724.

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 42771871 - 2⁹ = 42771359 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 42771871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42771821) 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, 119296 + ... + 119653.

It is an arithmetic number, because the mean of its divisors is an integer number (10752750).

Almost surely, 2^42771871 is an apocalyptic number.

42771871 is a deficient number, since it is larger than the sum of its proper divisors (239129).

42771871 is a wasteful number, since it uses less digits than its factorization.

42771871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239128.

The product of its digits is 21952, while the sum is 37.

The square root of 42771871 is about 6540.0207186216. The cubic root of 42771871 is about 349.7191515715.

The spelling of 42771871 in words is "forty-two million, seven hundred seventy-one thousand, eight hundred seventy-one".