42571117 has 4 divisors (see below), whose sum is σ = 42584256. Its totient is φ = 42557980.

The previous prime is 42571097. The next prime is 42571121. The reversal of 42571117 is 71117524.

42571117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42571117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42571157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2142 + ... + 9472.

It is an arithmetic number, because the mean of its divisors is an integer number (10646064).

Almost surely, 2^42571117 is an apocalyptic number.

It is an amenable number.

42571117 is a deficient number, since it is larger than the sum of its proper divisors (13139).

42571117 is an equidigital number, since it uses as much as digits as its factorization.

42571117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13138.

The product of its digits is 1960, while the sum is 28.

The square root of 42571117 is about 6524.6545502425. The cubic root of 42571117 is about 349.1711461791.

The spelling of 42571117 in words is "forty-two million, five hundred seventy-one thousand, one hundred seventeen".