140005 has 4 divisors (see below), whose sum is σ = 168012. Its totient is φ = 112000.

The previous prime is 139999. The next prime is 140009. The reversal of 140005 is 500041.

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 73441 + 66564 = 271^2 + 258^2 .

It is not a de Polignac number, because 140005 - 2⁹ = 139493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139973 and 140000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13996 + ... + 14005.

It is an arithmetic number, because the mean of its divisors is an integer number (42003).

2¹⁴⁰⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

140005 is a deficient number, since it is larger than the sum of its proper divisors (28007).

140005 is an equidigital number, since it uses as much as digits as its factorization.

140005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28006.

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 140005 is about 374.1724201488. The cubic root of 140005 is about 51.9255591652.

Adding to 140005 its reverse (500041), we get a palindrome (640046).

The spelling of 140005 in words is "one hundred forty thousand, five".