420030242 has 4 divisors (see below), whose sum is σ = 630045366. Its totient is φ = 210015120.

The previous prime is 420030239. The next prime is 420030251. The reversal of 420030242 is 242030024.

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., 237807241 + 182223001 = 15421^2 + 13499^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 420030242.

It is an unprimeable number.

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, 105007559 + ... + 105007562.

Almost surely, 2^420030242 is an apocalyptic number.

420030242 is a deficient number, since it is larger than the sum of its proper divisors (210015124).

420030242 is a wasteful number, since it uses less digits than its factorization.

420030242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210015123.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 420030242 is about 20494.6393478880. The cubic root of 420030242 is about 748.9052127729.

Adding to 420030242 its reverse (242030024), we get a palindrome (662060266).

The spelling of 420030242 in words is "four hundred twenty million, thirty thousand, two hundred forty-two".