421313421 has 8 divisors (see below), whose sum is σ = 581122080. Its totient is φ = 271190192.

The previous prime is 421313419. The next prime is 421313489. The reversal of 421313421 is 124313124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421313421 - 2¹ = 421313419 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421313401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2421255 + ... + 2421428.

It is an arithmetic number, because the mean of its divisors is an integer number (72640260).

Almost surely, 2^421313421 is an apocalyptic number.

It is an amenable number.

421313421 is a deficient number, since it is larger than the sum of its proper divisors (159808659).

421313421 is a wasteful number, since it uses less digits than its factorization.

421313421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4842715.

The product of its digits is 576, while the sum is 21.

The square root of 421313421 is about 20525.9207101655. The cubic root of 421313421 is about 749.6670646717.

Adding to 421313421 its reverse (124313124), we get a palindrome (545626545).

The spelling of 421313421 in words is "four hundred twenty-one million, three hundred thirteen thousand, four hundred twenty-one".