140039 has 4 divisors (see below), whose sum is σ = 141240. Its totient is φ = 138840.

The previous prime is 140009. The next prime is 140053. The reversal of 140039 is 930041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 930041 = 7 ⋅132863.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140039 is a prime.

It is a super-2 number, since 2×140039² = 39221843042, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139999 and 140026.

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 pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 404 + ... + 665.

It is an arithmetic number, because the mean of its divisors is an integer number (35310).

2¹⁴⁰⁰³⁹ is an apocalyptic number.

140039 is a deficient number, since it is larger than the sum of its proper divisors (1201).

140039 is a wasteful number, since it uses less digits than its factorization.

140039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 140039 is about 374.2178509906. The cubic root of 140039 is about 51.9297621725.

Subtracting from 140039 its product of nonzero digits (108), we obtain a palindrome (139931).

The spelling of 140039 in words is "one hundred forty thousand, thirty-nine".