202140242 has 4 divisors (see below), whose sum is σ = 303210366. Its totient is φ = 101070120.

The previous prime is 202140241. The next prime is 202140247. The reversal of 202140242 is 242041202.

It is a happy number.

202140242 is digitally balanced in base 3, 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.

It can be written as a sum of positive squares in only one way, i.e., 194909521 + 7230721 = 13961^2 + 2689^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 202140242.

It is not an unprimeable number, because it can be changed into a prime (202140241) 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, 50535059 + ... + 50535062.

Almost surely, 2^202140242 is an apocalyptic number.

202140242 is a deficient number, since it is larger than the sum of its proper divisors (101070124).

202140242 is a wasteful number, since it uses less digits than its factorization.

202140242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101070123.

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

The square root of 202140242 is about 14217.6032438664. The cubic root of 202140242 is about 586.8821857244.

Adding to 202140242 its reverse (242041202), we get a palindrome (444181444).

The spelling of 202140242 in words is "two hundred two million, one hundred forty thousand, two hundred forty-two".