140240 has 20 divisors (see below), whose sum is σ = 326244. Its totient is φ = 56064.

The previous prime is 140237. The next prime is 140249. The reversal of 140240 is 42041.

140240 is nontrivially palindromic in base 9.

It can be written as a sum of positive squares in 2 ways, for example, as 21904 + 118336 = 148^2 + 344^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140249) 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, 797 + ... + 956.

2¹⁴⁰²⁴⁰ is an apocalyptic number.

140240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140240 is an abundant number, since it is smaller than the sum of its proper divisors (186004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

140240 is a wasteful number, since it uses less digits than its factorization.

140240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1766 (or 1760 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 140240 is about 374.4863148367. The cubic root of 140240 is about 51.9545954744.

Adding to 140240 its reverse (42041), we get a palindrome (182281).

The spelling of 140240 in words is "one hundred forty thousand, two hundred forty", and thus it is an iban number.