142668717 has 4 divisors (see below), whose sum is σ = 190224960. Its totient is φ = 95112476.

The previous prime is 142668689. The next prime is 142668731. The reversal of 142668717 is 717866241.

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.

It is a cyclic number.

It is not a de Polignac number, because 142668717 - 2⁶ = 142668653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142668917) 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, 23778117 + ... + 23778122.

It is an arithmetic number, because the mean of its divisors is an integer number (47556240).

Almost surely, 2^142668717 is an apocalyptic number.

It is an amenable number.

142668717 is a deficient number, since it is larger than the sum of its proper divisors (47556243).

142668717 is an equidigital number, since it uses as much as digits as its factorization.

142668717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47556242.

The product of its digits is 112896, while the sum is 42.

The square root of 142668717 is about 11944.4010733063. The cubic root of 142668717 is about 522.5280215125.

The spelling of 142668717 in words is "one hundred forty-two million, six hundred sixty-eight thousand, seven hundred seventeen".