142385 has 4 divisors (see below), whose sum is σ = 170868. Its totient is φ = 113904.

The previous prime is 142381. The next prime is 142391. The reversal of 142385 is 583241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 583241 = 83 ⋅7027.

It can be written as a sum of positive squares in 2 ways, for example, as 57121 + 85264 = 239^2 + 292^2 .

It is a cyclic number.

It is not a de Polignac number, because 142385 - 2² = 142381 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 142385.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 142385.

It is not an unprimeable number, because it can be changed into a prime (142381) by changing a digit.

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, 14234 + ... + 14243.

It is an arithmetic number, because the mean of its divisors is an integer number (42717).

2¹⁴²³⁸⁵ is an apocalyptic number.

It is an amenable number.

142385 is a deficient number, since it is larger than the sum of its proper divisors (28483).

142385 is an equidigital number, since it uses as much as digits as its factorization.

142385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28482.

The product of its digits is 960, while the sum is 23.

The square root of 142385 is about 377.3393697986. The cubic root of 142385 is about 52.2181417934.

The spelling of 142385 in words is "one hundred forty-two thousand, three hundred eighty-five".