171742872 has 64 divisors (see below), whose sum is σ = 507628800. Its totient is φ = 47376000.

The previous prime is 171742871. The next prime is 171742873. The reversal of 171742872 is 278247171.

It is an interprime number because it is at equal distance from previous prime (171742871) and next prime (171742873).

It is a super-2 number, since 2×171742872² = 58991228165616768, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 171742872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171742871) 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, 12754 + ... + 22497.

It is an arithmetic number, because the mean of its divisors is an integer number (7931700).

Almost surely, 2^171742872 is an apocalyptic number.

171742872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

171742872 is an abundant number, since it is smaller than the sum of its proper divisors (335885928).

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

171742872 is a wasteful number, since it uses less digits than its factorization.

171742872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35296 (or 35292 counting only the distinct ones).

The product of its digits is 43904, while the sum is 39.

The square root of 171742872 is about 13105.0704690971. The cubic root of 171742872 is about 555.8525133710.

The spelling of 171742872 in words is "one hundred seventy-one million, seven hundred forty-two thousand, eight hundred seventy-two".