140224642 has 4 divisors (see below), whose sum is σ = 210336966. Its totient is φ = 70112320.

The previous prime is 140224639. The next prime is 140224649. The reversal of 140224642 is 246422041.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 246422041 = 103 ⋅2392447.

It can be written as a sum of positive squares in only one way, i.e., 139736041 + 488601 = 11821^2 + 699^2 .

It is not an unprimeable number, because it can be changed into a prime (140224649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35056159 + ... + 35056162.

Almost surely, 2^140224642 is an apocalyptic number.

140224642 is a deficient number, since it is larger than the sum of its proper divisors (70112324).

140224642 is an equidigital number, since it uses as much as digits as its factorization.

140224642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70112323.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 140224642 is about 11841.6486183301. The cubic root of 140224642 is about 519.5269885005.

Adding to 140224642 its reverse (246422041), we get a palindrome (386646683).

The spelling of 140224642 in words is "one hundred forty million, two hundred twenty-four thousand, six hundred forty-two".