42668971 has 4 divisors (see below), whose sum is σ = 42694344. Its totient is φ = 42643600.

The previous prime is 42668959. The next prime is 42668993. The reversal of 42668971 is 17986624.

42668971 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.

It is a cyclic number.

It is not a de Polignac number, because 42668971 - 2⁹ = 42668459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42668921) 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, 9970 + ... + 13591.

It is an arithmetic number, because the mean of its divisors is an integer number (10673586).

Almost surely, 2^42668971 is an apocalyptic number.

42668971 is a deficient number, since it is larger than the sum of its proper divisors (25373).

42668971 is a wasteful number, since it uses less digits than its factorization.

42668971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25372.

The product of its digits is 145152, while the sum is 43.

The square root of 42668971 is about 6532.1490338173. The cubic root of 42668971 is about 349.4384764706.

The spelling of 42668971 in words is "forty-two million, six hundred sixty-eight thousand, nine hundred seventy-one".