42112271 has 4 divisors (see below), whose sum is σ = 42521232. Its totient is φ = 41703312.

The previous prime is 42112261. The next prime is 42112297. The reversal of 42112271 is 17221124.

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 42112271 - 2¹⁰ = 42111247 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42112201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204326 + ... + 204531.

It is an arithmetic number, because the mean of its divisors is an integer number (10630308).

Almost surely, 2^42112271 is an apocalyptic number.

42112271 is a deficient number, since it is larger than the sum of its proper divisors (408961).

42112271 is a wasteful number, since it uses less digits than its factorization.

42112271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408960.

The product of its digits is 224, while the sum is 20.

The square root of 42112271 is about 6489.3968132639. The cubic root of 42112271 is about 347.9121166858.

Adding to 42112271 its reverse (17221124), we get a palindrome (59333395).

The spelling of 42112271 in words is "forty-two million, one hundred twelve thousand, two hundred seventy-one".