420471 has 20 divisors (see below), whose sum is σ = 653400. Its totient is φ = 269136.

The previous prime is 420467. The next prime is 420479. The reversal of 420471 is 174024.

It is a happy number.

It is not a de Polignac number, because 420471 - 2² = 420467 is a prime.

It is a super-3 number, since 3×420471³ = 223012598472441333, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420479) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2260 + ... + 2438.

It is an arithmetic number, because the mean of its divisors is an integer number (32670).

2⁴²⁰⁴⁷¹ is an apocalyptic number.

420471 is a deficient number, since it is larger than the sum of its proper divisors (232929).

420471 is a wasteful number, since it uses less digits than its factorization.

420471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 420471 is about 648.4373524096. The cubic root of 420471 is about 74.9167075324.

Adding to 420471 its reverse (174024), we get a palindrome (594495).

The spelling of 420471 in words is "four hundred twenty thousand, four hundred seventy-one", and thus it is an iban number.