421055321 has 4 divisors (see below), whose sum is σ = 435574500. Its totient is φ = 406536144.

The previous prime is 421055311. The next prime is 421055339. The reversal of 421055321 is 123550124.

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 211848025 + 209207296 = 14555^2 + 14464^2 .

It is a cyclic number.

It is not a de Polignac number, because 421055321 - 2²⁶ = 353946457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421055311) 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, 7259546 + ... + 7259603.

It is an arithmetic number, because the mean of its divisors is an integer number (108893625).

Almost surely, 2^421055321 is an apocalyptic number.

It is an amenable number.

421055321 is a deficient number, since it is larger than the sum of its proper divisors (14519179).

421055321 is a wasteful number, since it uses less digits than its factorization.

421055321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14519178.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 421055321 is about 20519.6325746832. The cubic root of 421055321 is about 749.5139493707.

The spelling of 421055321 in words is "four hundred twenty-one million, fifty-five thousand, three hundred twenty-one".