420475 has 18 divisors (see below), whose sum is σ = 577220. Its totient is φ = 303600.

The previous prime is 420467. The next prime is 420479. The reversal of 420475 is 574024.

It is not a de Polignac number, because 420475 - 2³ = 420467 is a prime.

420475 is a lucky 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 17 ways as a sum of consecutive naturals, for example, 2956 + ... + 3094.

2⁴²⁰⁴⁷⁵ is an apocalyptic number.

420475 is a deficient number, since it is larger than the sum of its proper divisors (156745).

420475 is a wasteful number, since it uses less digits than its factorization.

420475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 420475 is about 648.4404367403. The cubic root of 420475 is about 74.9169450961.

Adding to 420475 its reverse (574024), we get a palindrome (994499).

The spelling of 420475 in words is "four hundred twenty thousand, four hundred seventy-five".