171871542 has 12 divisors (see below), whose sum is σ = 372388380. Its totient is φ = 57290508.

The previous prime is 171871537. The next prime is 171871561. The reversal of 171871542 is 245178171.

It is a junction number, because it is equal to n+sod(n) for n = 171871497 and 171871506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4774192 + ... + 4774227.

It is an arithmetic number, because the mean of its divisors is an integer number (31032365).

Almost surely, 2^171871542 is an apocalyptic number.

171871542 is an abundant number, since it is smaller than the sum of its proper divisors (200516838).

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

171871542 is a wasteful number, since it uses less digits than its factorization.

171871542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9548427 (or 9548424 counting only the distinct ones).

The product of its digits is 15680, while the sum is 36.

The square root of 171871542 is about 13109.9787185182. The cubic root of 171871542 is about 555.9912938788.

The spelling of 171871542 in words is "one hundred seventy-one million, eight hundred seventy-one thousand, five hundred forty-two".