142668671 has 2 divisors, whose sum is σ = 142668672. Its totient is φ = 142668670.

The previous prime is 142668653. The next prime is 142668677. The reversal of 142668671 is 176866241.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142668671 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142668677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71334335 + 71334336.

It is an arithmetic number, because the mean of its divisors is an integer number (71334336).

Almost surely, 2^142668671 is an apocalyptic number.

142668671 is a deficient number, since it is larger than the sum of its proper divisors (1).

142668671 is an equidigital number, since it uses as much as digits as its factorization.

142668671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 41.

The square root of 142668671 is about 11944.3991477177. The cubic root of 142668671 is about 522.5279653538.

The spelling of 142668671 in words is "one hundred forty-two million, six hundred sixty-eight thousand, six hundred seventy-one".