140242 has 4 divisors (see below), whose sum is σ = 210366. Its totient is φ = 70120.

The previous prime is 140237. The next prime is 140249. The reversal of 140242 is 242041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242041 = 19 ⋅12739.

It can be written as a sum of positive squares in only one way, i.e., 137641 + 2601 = 371^2 + 51^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (140249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35059 + ... + 35062.

2¹⁴⁰²⁴² is an apocalyptic number.

140242 is a deficient number, since it is larger than the sum of its proper divisors (70124).

140242 is an equidigital number, since it uses as much as digits as its factorization.

140242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70123.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 140242 is about 374.4889851518. The cubic root of 140242 is about 51.9548424527.

Adding to 140242 its reverse (242041), we get a palindrome (382283).

It can be divided in two parts, 1402 and 42, that added together give a square (1444 = 38²).

The spelling of 140242 in words is "one hundred forty thousand, two hundred forty-two", and thus it is an iban number.