421304441 has 4 divisors (see below), whose sum is σ = 422498292. Its totient is φ = 420110592.

The previous prime is 421304437. The next prime is 421304447. The reversal of 421304441 is 144403124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 281568400 + 139736041 = 16780^2 + 11821^2 .

It is a cyclic number.

It is not a de Polignac number, because 421304441 - 2² = 421304437 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421304447) 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, 596396 + ... + 597101.

It is an arithmetic number, because the mean of its divisors is an integer number (105624573).

Almost surely, 2^421304441 is an apocalyptic number.

It is an amenable number.

421304441 is a deficient number, since it is larger than the sum of its proper divisors (1193851).

421304441 is a wasteful number, since it uses less digits than its factorization.

421304441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193850.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 421304441 is about 20525.7019611998. The cubic root of 421304441 is about 749.6617384247.

Adding to 421304441 its reverse (144403124), we get a palindrome (565707565).

The spelling of 421304441 in words is "four hundred twenty-one million, three hundred four thousand, four hundred forty-one".