42257871 has 12 divisors (see below), whose sum is σ = 61198072. Its totient is φ = 28098576.

The previous prime is 42257861. The next prime is 42257899. The reversal of 42257871 is 17875224.

It is not a de Polignac number, because 42257871 - 2²¹ = 40160719 is a prime.

It is a super-2 number, since 2×42257871² = 3571455322905282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42257861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2341 + ... + 9486.

Almost surely, 2^42257871 is an apocalyptic number.

42257871 is a deficient number, since it is larger than the sum of its proper divisors (18940201).

42257871 is a wasteful number, since it uses less digits than its factorization.

42257871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12230 (or 12227 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 42257871 is about 6500.6054333423. The cubic root of 42257871 is about 348.3126154407.

The spelling of 42257871 in words is "forty-two million, two hundred fifty-seven thousand, eight hundred seventy-one".