142322185 has 4 divisors (see below), whose sum is σ = 170786628. Its totient is φ = 113857744.

The previous prime is 142322171. The next prime is 142322189. The reversal of 142322185 is 581223241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 581223241 = 2417 ⋅240473.

It can be written as a sum of positive squares in 2 ways, for example, as 14722569 + 127599616 = 3837^2 + 11296^2 .

It is a cyclic number.

It is not a de Polignac number, because 142322185 - 2⁵ = 142322153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142322189) 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 3 ways as a sum of consecutive naturals, for example, 14232214 + ... + 14232223.

It is an arithmetic number, because the mean of its divisors is an integer number (42696657).

Almost surely, 2^142322185 is an apocalyptic number.

It is an amenable number.

142322185 is a deficient number, since it is larger than the sum of its proper divisors (28464443).

142322185 is an equidigital number, since it uses as much as digits as its factorization.

142322185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28464442.

The product of its digits is 3840, while the sum is 28.

The square root of 142322185 is about 11929.8862106895. The cubic root of 142322185 is about 522.1046175913.

The spelling of 142322185 in words is "one hundred forty-two million, three hundred twenty-two thousand, one hundred eighty-five".