158439171 has 16 divisors (see below), whose sum is σ = 237892608. Its totient is φ = 92925600.

The previous prime is 158439137. The next prime is 158439173. The reversal of 158439171 is 171934851.

It is not a de Polignac number, because 158439171 - 2⁶ = 158439107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (158439173) 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 15 ways as a sum of consecutive naturals, for example, 76416 + ... + 78461.

It is an arithmetic number, because the mean of its divisors is an integer number (14868288).

Almost surely, 2^158439171 is an apocalyptic number.

158439171 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

158439171 is a deficient number, since it is larger than the sum of its proper divisors (79453437).

158439171 is a wasteful number, since it uses less digits than its factorization.

158439171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154922.

The product of its digits is 30240, while the sum is 39.

The square root of 158439171 is about 12587.2622519752. The cubic root of 158439171 is about 541.1124426462.

It can be divided in two parts, 1584 and 39171, that added together give a triangular number (40755 = T₂₈₅).

The spelling of 158439171 in words is "one hundred fifty-eight million, four hundred thirty-nine thousand, one hundred seventy-one".