85171842 has 48 divisors (see below), whose sum is σ = 216058752. Its totient is φ = 23739840.

The previous prime is 85171841. The next prime is 85171847. The reversal of 85171842 is 24817158.

It is a junction number, because it is equal to n+sod(n) for n = 85171797 and 85171806.

It is not an unprimeable number, because it can be changed into a prime (85171841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3078 + ... + 13409.

It is an arithmetic number, because the mean of its divisors is an integer number (4501224).

Almost surely, 2^85171842 is an apocalyptic number.

85171842 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

85171842 is an abundant number, since it is smaller than the sum of its proper divisors (130886910).

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

85171842 is a wasteful number, since it uses less digits than its factorization.

85171842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16543 (or 16540 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 85171842 is about 9228.8591927713. The cubic root of 85171842 is about 439.9790658084.

The spelling of 85171842 in words is "eighty-five million, one hundred seventy-one thousand, eight hundred forty-two".