171142158 has 72 divisors (see below), whose sum is σ = 397681704. Its totient is φ = 49056480.

The previous prime is 171142129. The next prime is 171142183. The reversal of 171142158 is 851241171.

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 261760 + ... + 262412.

It is an arithmetic number, because the mean of its divisors is an integer number (5523357).

Almost surely, 2^171142158 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 171142158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198840852).

171142158 is an abundant number, since it is smaller than the sum of its proper divisors (226539546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

171142158 is a wasteful number, since it uses less digits than its factorization.

171142158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718 (or 688 counting only the distinct ones).

The product of its digits is 2240, while the sum is 30.

The square root of 171142158 is about 13082.1312483861. The cubic root of 171142158 is about 555.2036781856.

The spelling of 171142158 in words is "one hundred seventy-one million, one hundred forty-two thousand, one hundred fifty-eight".