142235171 has 16 divisors (see below), whose sum is σ = 157662624. Its totient is φ = 127505664.

The previous prime is 142235143. The next prime is 142235179. The reversal of 142235171 is 171532241.

It is a de Polignac number, because none of the positive numbers 2^k-142235171 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142235171.

It is not an unprimeable number, because it can be changed into a prime (142235179) 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, 62465 + ... + 64701.

It is an arithmetic number, because the mean of its divisors is an integer number (9853914).

Almost surely, 2^142235171 is an apocalyptic number.

142235171 is a deficient number, since it is larger than the sum of its proper divisors (15427453).

142235171 is a wasteful number, since it uses less digits than its factorization.

142235171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2390.

The product of its digits is 1680, while the sum is 26.

The square root of 142235171 is about 11926.2387616549. The cubic root of 142235171 is about 521.9981931598.

The spelling of 142235171 in words is "one hundred forty-two million, two hundred thirty-five thousand, one hundred seventy-one".