142133185 has 4 divisors (see below), whose sum is σ = 170559828. Its totient is φ = 113706544.

The previous prime is 142133179. The next prime is 142133203. The reversal of 142133185 is 581331241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 581331241 = 4729 ⋅122929.

It can be written as a sum of positive squares in 2 ways, for example, as 46895104 + 95238081 = 6848^2 + 9759^2 .

It is a cyclic number.

It is not a de Polignac number, because 142133185 - 2⁵ = 142133153 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 14213314 + ... + 14213323.

It is an arithmetic number, because the mean of its divisors is an integer number (42639957).

Almost surely, 2^142133185 is an apocalyptic number.

It is an amenable number.

142133185 is a deficient number, since it is larger than the sum of its proper divisors (28426643).

142133185 is an equidigital number, since it uses as much as digits as its factorization.

142133185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28426642.

The product of its digits is 2880, while the sum is 28.

The square root of 142133185 is about 11921.9622965349. The cubic root of 142133185 is about 521.8734016230.

The spelling of 142133185 in words is "one hundred forty-two million, one hundred thirty-three thousand, one hundred eighty-five".