421434242 has 16 divisors (see below), whose sum is σ = 649009152. Its totient is φ = 205145280.

The previous prime is 421434241. The next prime is 421434253. The reversal of 421434242 is 242434124.

It is a happy number.

It is a super-2 number, since 2×421434242² = 355213640660229128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (421434241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6218 + ... + 29690.

It is an arithmetic number, because the mean of its divisors is an integer number (40563072).

Almost surely, 2^421434242 is an apocalyptic number.

421434242 is a deficient number, since it is larger than the sum of its proper divisors (227574910).

421434242 is a wasteful number, since it uses less digits than its factorization.

421434242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23713.

The product of its digits is 6144, while the sum is 26.

The square root of 421434242 is about 20528.8636314824. The cubic root of 421434242 is about 749.7387190610.

Adding to 421434242 its reverse (242434124), we get a palindrome (663868366).

The spelling of 421434242 in words is "four hundred twenty-one million, four hundred thirty-four thousand, two hundred forty-two".