421566242 has 16 divisors (see below), whose sum is σ = 644042112. Its totient is φ = 206899920.

The previous prime is 421566239. The next prime is 421566247. The reversal of 421566242 is 242665124.

It is a junction number, because it is equal to n+sod(n) for n = 421566199 and 421566208.

It is not an unprimeable number, because it can be changed into a prime (421566247) 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, 60503 + ... + 67109.

It is an arithmetic number, because the mean of its divisors is an integer number (40252632).

Almost surely, 2^421566242 is an apocalyptic number.

421566242 is a deficient number, since it is larger than the sum of its proper divisors (222475870).

421566242 is a wasteful number, since it uses less digits than its factorization.

421566242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7193.

The product of its digits is 23040, while the sum is 32.

The square root of 421566242 is about 20532.0783653287. The cubic root of 421566242 is about 749.8169876419.

The spelling of 421566242 in words is "four hundred twenty-one million, five hundred sixty-six thousand, two hundred forty-two".