142128871 has 2 divisors, whose sum is σ = 142128872. Its totient is φ = 142128870.

The previous prime is 142128863. The next prime is 142128907. The reversal of 142128871 is 178821241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142128871 - 2³ = 142128863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142128271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71064435 + 71064436.

It is an arithmetic number, because the mean of its divisors is an integer number (71064436).

Almost surely, 2^142128871 is an apocalyptic number.

142128871 is a deficient number, since it is larger than the sum of its proper divisors (1).

142128871 is an equidigital number, since it uses as much as digits as its factorization.

142128871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7168, while the sum is 34.

The square root of 142128871 is about 11921.7813685707. The cubic root of 142128871 is about 521.8681216348.

The spelling of 142128871 in words is "one hundred forty-two million, one hundred twenty-eight thousand, eight hundred seventy-one".