321420041 has 4 divisors (see below), whose sum is σ = 326689284. Its totient is φ = 316150800.

The previous prime is 321420031. The next prime is 321420067. The reversal of 321420041 is 140024123.

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 141967225 + 179452816 = 11915^2 + 13396^2 .

It is a de Polignac number, because none of the positive numbers 2^k-321420041 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (321420031) 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, 2634530 + ... + 2634651.

It is an arithmetic number, because the mean of its divisors is an integer number (81672321).

Almost surely, 2^321420041 is an apocalyptic number.

It is an amenable number.

321420041 is a deficient number, since it is larger than the sum of its proper divisors (5269243).

321420041 is an equidigital number, since it uses as much as digits as its factorization.

321420041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5269242.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 321420041 is about 17928.1912361510. The cubic root of 321420041 is about 685.0006507178. Note that the first 3 decimals are identical.

Adding to 321420041 its reverse (140024123), we get a palindrome (461444164).

The spelling of 321420041 in words is "three hundred twenty-one million, four hundred twenty thousand, forty-one".