420242242 has 16 divisors (see below), whose sum is σ = 721091520. Its totient is φ = 179934768.

The previous prime is 420242233. The next prime is 420242243. The reversal of 420242242 is 242242024.

It is a happy number.

It is a super-2 number, since 2×420242242² = 353207083922373128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (420242243) 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 in 7 ways as a sum of consecutive naturals, for example, 1993 + ... + 29059.

It is an arithmetic number, because the mean of its divisors is an integer number (45068220).

Almost surely, 2^420242242 is an apocalyptic number.

420242242 is a deficient number, since it is larger than the sum of its proper divisors (300849278).

420242242 is a wasteful number, since it uses less digits than its factorization.

420242242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28185.

The product of its (nonzero) digits is 2048, while the sum is 22.

The square root of 420242242 is about 20499.8107796145. The cubic root of 420242242 is about 749.0311887823.

Adding to 420242242 its reverse (242242024), we get a palindrome (662484266).

The spelling of 420242242 in words is "four hundred twenty million, two hundred forty-two thousand, two hundred forty-two".