140709 has 16 divisors (see below), whose sum is σ = 207360. Its totient is φ = 84480.

The previous prime is 140689. The next prime is 140717. The reversal of 140709 is 907041.

It is not a de Polignac number, because 140709 - 2⁵ = 140677 is a prime.

It is a Curzon 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 140709.

It is not an unprimeable number, because it can be changed into a prime (140729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1537 + ... + 1625.

It is an arithmetic number, because the mean of its divisors is an integer number (12960).

2¹⁴⁰⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

140709 is a deficient number, since it is larger than the sum of its proper divisors (66651).

140709 is a wasteful number, since it uses less digits than its factorization.

140709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 140709 is about 375.1119832797. Note that the first 3 decimals coincide. The cubic root of 140709 is about 52.0124477104.

The spelling of 140709 in words is "one hundred forty thousand, seven hundred nine".