421204242 has 16 divisors (see below), whose sum is σ = 843076512. Its totient is φ = 140290080.

The previous prime is 421204229. The next prime is 421204243. The reversal of 421204242 is 242402124.

It is not an unprimeable number, because it can be changed into a prime (421204243) 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, 19443 + ... + 34934.

It is an arithmetic number, because the mean of its divisors is an integer number (52692282).

Almost surely, 2^421204242 is an apocalyptic number.

421204242 is an abundant number, since it is smaller than the sum of its proper divisors (421872270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421204242 is a wasteful number, since it uses less digits than its factorization.

421204242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55673.

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 421204242 is about 20523.2609981942. The cubic root of 421204242 is about 749.6023029311.

Adding to 421204242 its reverse (242402124), we get a palindrome (663606366).

The spelling of 421204242 in words is "four hundred twenty-one million, two hundred four thousand, two hundred forty-two".