42171667 has 4 divisors (see below), whose sum is σ = 42185320. Its totient is φ = 42158016.

The previous prime is 42171631. The next prime is 42171677. The reversal of 42171667 is 76617124.

It is a happy number.

42171667 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 brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42171667 - 2²³ = 33783059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42171617) 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, 259 + ... + 9187.

It is an arithmetic number, because the mean of its divisors is an integer number (10546330).

Almost surely, 2^42171667 is an apocalyptic number.

42171667 is a deficient number, since it is larger than the sum of its proper divisors (13653).

42171667 is an equidigital number, since it uses as much as digits as its factorization.

42171667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13652.

The product of its digits is 14112, while the sum is 34.

The square root of 42171667 is about 6493.9715890971. The cubic root of 42171667 is about 348.0756072785.

The spelling of 42171667 in words is "forty-two million, one hundred seventy-one thousand, six hundred sixty-seven".