421004041 has 4 divisors (see below), whose sum is σ = 421067284. Its totient is φ = 420940800.

The previous prime is 421004039. The next prime is 421004047. The reversal of 421004041 is 140400124.

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 144480400 + 276523641 = 12020^2 + 16629^2 .

It is a cyclic number.

It is not a de Polignac number, because 421004041 - 2¹ = 421004039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421004047) 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, 20280 + ... + 35401.

It is an arithmetic number, because the mean of its divisors is an integer number (105266821).

Almost surely, 2^421004041 is an apocalyptic number.

It is an amenable number.

421004041 is a deficient number, since it is larger than the sum of its proper divisors (63243).

421004041 is an equidigital number, since it uses as much as digits as its factorization.

421004041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63242.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 421004041 is about 20518.3830015915. The cubic root of 421004041 is about 749.4835205618.

Adding to 421004041 its reverse (140400124), we get a palindrome (561404165).

The spelling of 421004041 in words is "four hundred twenty-one million, four thousand, forty-one".