140442 has 16 divisors (see below), whose sum is σ = 285120. Its totient is φ = 46112.

The previous prime is 140423. The next prime is 140443. The reversal of 140442 is 244041.

It is a plaindrome in base 16.

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 140442.

It is not an unprimeable number, because it can be changed into a prime (140443) by changing a digit.

140442 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 403 + ... + 665.

It is an arithmetic number, because the mean of its divisors is an integer number (17820).

2¹⁴⁰⁴⁴² is an apocalyptic number.

140442 is an abundant number, since it is smaller than the sum of its proper divisors (144678).

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

140442 is a wasteful number, since it uses less digits than its factorization.

140442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 140442 is about 374.7559205670. The cubic root of 140442 is about 51.9795284309.

Adding to 140442 its reverse (244041), we get a palindrome (384483).

The spelling of 140442 in words is "one hundred forty thousand, four hundred forty-two", and thus it is an iban number.