142688671 has 4 divisors (see below), whose sum is σ = 147609000. Its totient is φ = 137768344.

The previous prime is 142688621. The next prime is 142688723. The reversal of 142688671 is 176886241.

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 142688671 - 2⁷ = 142688543 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 (142688621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2460121 + ... + 2460178.

It is an arithmetic number, because the mean of its divisors is an integer number (36902250).

Almost surely, 2^142688671 is an apocalyptic number.

142688671 is a deficient number, since it is larger than the sum of its proper divisors (4920329).

142688671 is an equidigital number, since it uses as much as digits as its factorization.

142688671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4920328.

The product of its digits is 129024, while the sum is 43.

The square root of 142688671 is about 11945.2363308559. The cubic root of 142688671 is about 522.5523810645.

The spelling of 142688671 in words is "one hundred forty-two million, six hundred eighty-eight thousand, six hundred seventy-one".