170742872 has 16 divisors (see below), whose sum is σ = 320544240. Its totient is φ = 85264416.

The previous prime is 170742841. The next prime is 170742877. The reversal of 170742872 is 278247071.

It is a happy number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170742877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6383 + ... + 19550.

It is an arithmetic number, because the mean of its divisors is an integer number (20034015).

Almost surely, 2^170742872 is an apocalyptic number.

It is an amenable number.

170742872 is a deficient number, since it is larger than the sum of its proper divisors (149801368).

170742872 is a wasteful number, since it uses less digits than its factorization.

170742872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26762 (or 26758 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 38.

The square root of 170742872 is about 13066.8615971855. The cubic root of 170742872 is about 554.7715663003.

The spelling of 170742872 in words is "one hundred seventy million, seven hundred forty-two thousand, eight hundred seventy-two".