142705 has 4 divisors (see below), whose sum is σ = 171252. Its totient is φ = 114160.

The previous prime is 142699. The next prime is 142711. The reversal of 142705 is 507241.

142705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (142699) and next prime (142711).

It can be written as a sum of positive squares in 2 ways, for example, as 42849 + 99856 = 207^2 + 316^2 .

It is not a de Polignac number, because 142705 - 2³ = 142697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14266 + ... + 14275.

It is an arithmetic number, because the mean of its divisors is an integer number (42813).

2¹⁴²⁷⁰⁵ is an apocalyptic number.

It is an amenable number.

142705 is a deficient number, since it is larger than the sum of its proper divisors (28547).

142705 is an equidigital number, since it uses as much as digits as its factorization.

142705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28546.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 142705 is about 377.7631533117. The cubic root of 142705 is about 52.2572313580.

Adding to 142705 its reverse (507241), we get a palindrome (649946).

The spelling of 142705 in words is "one hundred forty-two thousand, seven hundred five".