142145 has 4 divisors (see below), whose sum is σ = 170580. Its totient is φ = 113712.

The previous prime is 142123. The next prime is 142151. The reversal of 142145 is 541241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49729 + 92416 = 223^2 + 304^2 .

It is a cyclic number.

It is not a de Polignac number, because 142145 - 2¹⁰ = 141121 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 142145.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14210 + ... + 14219.

It is an arithmetic number, because the mean of its divisors is an integer number (42645).

2¹⁴²¹⁴⁵ is an apocalyptic number.

It is an amenable number.

142145 is a deficient number, since it is larger than the sum of its proper divisors (28435).

142145 is an equidigital number, since it uses as much as digits as its factorization.

142145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28434.

The product of its digits is 160, while the sum is 17.

The square root of 142145 is about 377.0212195620. The cubic root of 142145 is about 52.1887861684.

Adding to 142145 its reverse (541241), we get a palindrome (683386).

The spelling of 142145 in words is "one hundred forty-two thousand, one hundred forty-five".