158128871 has 4 divisors (see below), whose sum is σ = 158154744. Its totient is φ = 158103000.

The previous prime is 158128829. The next prime is 158128891. The reversal of 158128871 is 178821851.

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 158128871 - 2²² = 153934567 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 (158128801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1916 + ... + 17886.

It is an arithmetic number, because the mean of its divisors is an integer number (39538686).

Almost surely, 2^158128871 is an apocalyptic number.

158128871 is a deficient number, since it is larger than the sum of its proper divisors (25873).

158128871 is an equidigital number, since it uses as much as digits as its factorization.

158128871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25872.

The product of its digits is 35840, while the sum is 41.

The square root of 158128871 is about 12574.9302582559. The cubic root of 158128871 is about 540.7589590903.

The spelling of 158128871 in words is "one hundred fifty-eight million, one hundred twenty-eight thousand, eight hundred seventy-one".