170720142 has 16 divisors (see below), whose sum is σ = 341891280. Its totient is φ = 56831552.

The previous prime is 170720141. The next prime is 170720159. The reversal of 170720142 is 241027071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170720141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13767 + ... + 23042.

It is an arithmetic number, because the mean of its divisors is an integer number (21368205).

Almost surely, 2^170720142 is an apocalyptic number.

170720142 is an abundant number, since it is smaller than the sum of its proper divisors (171171138).

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

170720142 is a wasteful number, since it uses less digits than its factorization.

170720142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37587.

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 170720142 is about 13065.9918108041. The cubic root of 170720142 is about 554.7469473764.

The spelling of 170720142 in words is "one hundred seventy million, seven hundred twenty thousand, one hundred forty-two".