140285 has 4 divisors (see below), whose sum is σ = 168348. Its totient is φ = 112224.

The previous prime is 140281. The next prime is 140297. The reversal of 140285 is 582041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 582041 = 127 ⋅4583.

It can be written as a sum of positive squares in 2 ways, for example, as 63001 + 77284 = 251^2 + 278^2 .

It is a cyclic number.

It is not a de Polignac number, because 140285 - 2² = 140281 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14024 + ... + 14033.

It is an arithmetic number, because the mean of its divisors is an integer number (42087).

2¹⁴⁰²⁸⁵ is an apocalyptic number.

It is an amenable number.

140285 is a deficient number, since it is larger than the sum of its proper divisors (28063).

140285 is an equidigital number, since it uses as much as digits as its factorization.

140285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28062.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 140285 is about 374.5463923201. The cubic root of 140285 is about 51.9601519176.

The spelling of 140285 in words is "one hundred forty thousand, two hundred eighty-five".