140705242 has 4 divisors (see below), whose sum is σ = 211057866. Its totient is φ = 70352620.

The previous prime is 140705239. The next prime is 140705267. The reversal of 140705242 is 242507041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242507041 = 7 ⋅34643863.

It can be written as a sum of positive squares in only one way, i.e., 104837121 + 35868121 = 10239^2 + 5989^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35176309 + ... + 35176312.

Almost surely, 2^140705242 is an apocalyptic number.

140705242 is a deficient number, since it is larger than the sum of its proper divisors (70352624).

140705242 is an equidigital number, since it uses as much as digits as its factorization.

140705242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70352623.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 140705242 is about 11861.9240429199. The cubic root of 140705242 is about 520.1198466367.

The spelling of 140705242 in words is "one hundred forty million, seven hundred five thousand, two hundred forty-two".