140220242 has 4 divisors (see below), whose sum is σ = 210330366. Its totient is φ = 70110120.

The previous prime is 140220221. The next prime is 140220251. The reversal of 140220242 is 242022041.

It is a happy number.

140220242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242022041 = 149 ⋅1624309.

It can be written as a sum of positive squares in only one way, i.e., 97042201 + 43178041 = 9851^2 + 6571^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 140220242.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35055059 + ... + 35055062.

Almost surely, 2^140220242 is an apocalyptic number.

140220242 is a deficient number, since it is larger than the sum of its proper divisors (70110124).

140220242 is an equidigital number, since it uses as much as digits as its factorization.

140220242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70110123.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 140220242 is about 11841.4628319309. The cubic root of 140220242 is about 519.5215544992.

Adding to 140220242 its reverse (242022041), we get a palindrome (382242283).

The spelling of 140220242 in words is "one hundred forty million, two hundred twenty thousand, two hundred forty-two".