140440452242 has 4 divisors (see below), whose sum is σ = 210660678366. Its totient is φ = 70220226120.

The previous prime is 140440452233. The next prime is 140440452277. The reversal of 140440452242 is 242254044041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242254044041 = 1013 ⋅239145157.

It can be written as a sum of positive squares in only one way, i.e., 97918300561 + 42522151681 = 312919^2 + 206209^2 .

It is a junction number, because it is equal to n+sod(n) for n = 140440452199 and 140440452208.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35110113059 + ... + 35110113062.

Almost surely, 2^140440452242 is an apocalyptic number.

140440452242 is a deficient number, since it is larger than the sum of its proper divisors (70220226124).

140440452242 is an equidigital number, since it uses as much as digits as its factorization.

140440452242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70220226123.

The product of its (nonzero) digits is 40960, while the sum is 32.

Adding to 140440452242 its reverse (242254044041), we get a palindrome (382694496283).

The spelling of 140440452242 in words is "one hundred forty billion, four hundred forty million, four hundred fifty-two thousand, two hundred forty-two".