142685 has 4 divisors (see below), whose sum is σ = 171228. Its totient is φ = 114144.

The previous prime is 142673. The next prime is 142697. The reversal of 142685 is 586241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 586241 = 31 ⋅18911.

It is an interprime number because it is at equal distance from previous prime (142673) and next prime (142697).

It can be written as a sum of positive squares in 2 ways, for example, as 33124 + 109561 = 182^2 + 331^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142685 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 142685.

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, 14264 + ... + 14273.

It is an arithmetic number, because the mean of its divisors is an integer number (42807).

2¹⁴²⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

142685 is a deficient number, since it is larger than the sum of its proper divisors (28543).

142685 is an equidigital number, since it uses as much as digits as its factorization.

142685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28542.

The product of its digits is 1920, while the sum is 26.

The square root of 142685 is about 377.7366807711. The cubic root of 142685 is about 52.2547899732.

Subtracting 142685 from its reverse (586241), we obtain a square (443556 = 666²).

The spelling of 142685 in words is "one hundred forty-two thousand, six hundred eighty-five".