421340441 has 4 divisors (see below), whose sum is σ = 421420800. Its totient is φ = 421260084.

The previous prime is 421340431. The next prime is 421340489. The reversal of 421340441 is 144043124.

It is a happy number.

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 421340441 - 2⁶ = 421340377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421340411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31721 + ... + 42998.

It is an arithmetic number, because the mean of its divisors is an integer number (105355200).

Almost surely, 2^421340441 is an apocalyptic number.

It is an amenable number.

421340441 is a deficient number, since it is larger than the sum of its proper divisors (80359).

421340441 is an equidigital number, since it uses as much as digits as its factorization.

421340441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80358.

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

The square root of 421340441 is about 20526.5788917686. The cubic root of 421340441 is about 749.6830904062.

Adding to 421340441 its reverse (144043124), we get a palindrome (565383565).

The spelling of 421340441 in words is "four hundred twenty-one million, three hundred forty thousand, four hundred forty-one".