420271 has 2 divisors, whose sum is σ = 420272. Its totient is φ = 420270.

The previous prime is 420269. The next prime is 420293. The reversal of 420271 is 172024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420271 - 2¹ = 420269 is a prime.

Together with 420269, it forms a pair of twin primes.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210135 + 210136.

It is an arithmetic number, because the mean of its divisors is an integer number (210136).

2⁴²⁰²⁷¹ is an apocalyptic number.

420271 is a deficient number, since it is larger than the sum of its proper divisors (1).

420271 is an equidigital number, since it uses as much as digits as its factorization.

420271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 420271 is about 648.2831171641. The cubic root of 420271 is about 74.9048274283.

Adding to 420271 its reverse (172024), we get a palindrome (592295).

The spelling of 420271 in words is "four hundred twenty thousand, two hundred seventy-one", and thus it is an iban number.