420221271 has 8 divisors (see below), whose sum is σ = 589784320. Its totient is φ = 265402872.

The previous prime is 420221251. The next prime is 420221279. The reversal of 420221271 is 172122024.

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

It is not a de Polignac number, because 420221271 - 2¹⁰ = 420220247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420221279) 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, 3686095 + ... + 3686208.

It is an arithmetic number, because the mean of its divisors is an integer number (73723040).

Almost surely, 2^420221271 is an apocalyptic number.

420221271 is a deficient number, since it is larger than the sum of its proper divisors (169563049).

420221271 is a wasteful number, since it uses less digits than its factorization.

420221271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7372325.

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 420221271 is about 20499.2992807071. The cubic root of 420221271 is about 749.0187291477.

Adding to 420221271 its reverse (172122024), we get a palindrome (592343295).

The spelling of 420221271 in words is "four hundred twenty million, two hundred twenty-one thousand, two hundred seventy-one".