421304313 has 4 divisors (see below), whose sum is σ = 561739088. Its totient is φ = 280869540.

The previous prime is 421304269. The next prime is 421304321. The reversal of 421304313 is 313403124.

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 not a de Polignac number, because 421304313 - 2⁹ = 421303801 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421304313.

It is not an unprimeable number, because it can be changed into a prime (421304113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70217383 + ... + 70217388.

It is an arithmetic number, because the mean of its divisors is an integer number (140434772).

Almost surely, 2^421304313 is an apocalyptic number.

It is an amenable number.

421304313 is a deficient number, since it is larger than the sum of its proper divisors (140434775).

421304313 is a wasteful number, since it uses less digits than its factorization.

421304313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140434774.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 421304313 is about 20525.6988431576. The cubic root of 421304313 is about 749.6616625044.

Adding to 421304313 its reverse (313403124), we get a palindrome (734707437).

The spelling of 421304313 in words is "four hundred twenty-one million, three hundred four thousand, three hundred thirteen".