421404234 has 8 divisors (see below), whose sum is σ = 842808480. Its totient is φ = 140468076.

The previous prime is 421404223. The next prime is 421404239. The reversal of 421404234 is 432404124.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

421404234 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (421404239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35117014 + ... + 35117025.

It is an arithmetic number, because the mean of its divisors is an integer number (105351060).

Almost surely, 2^421404234 is an apocalyptic number.

421404234 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

421404234 is a wasteful number, since it uses less digits than its factorization.

421404234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70234044.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 421404234 is about 20528.1327450891. The cubic root of 421404234 is about 749.7209237237.

Adding to 421404234 its reverse (432404124), we get a palindrome (853808358).

The spelling of 421404234 in words is "four hundred twenty-one million, four hundred four thousand, two hundred thirty-four".