421404241 has 4 divisors (see below), whose sum is σ = 427339584. Its totient is φ = 415468900.

The previous prime is 421404239. The next prime is 421404251. The reversal of 421404241 is 142404124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 421404241 - 2¹ = 421404239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421404251) 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, 2967565 + ... + 2967706.

It is an arithmetic number, because the mean of its divisors is an integer number (106834896).

Almost surely, 2^421404241 is an apocalyptic number.

It is an amenable number.

421404241 is a deficient number, since it is larger than the sum of its proper divisors (5935343).

421404241 is an equidigital number, since it uses as much as digits as its factorization.

421404241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5935342.

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 421404241 is about 20528.1329155868. The cubic root of 421404241 is about 749.7209278749.

Adding to 421404241 its reverse (142404124), we get a palindrome (563808365).

The spelling of 421404241 in words is "four hundred twenty-one million, four hundred four thousand, two hundred forty-one".