420275 has 6 divisors (see below), whose sum is σ = 521172. Its totient is φ = 336200.

The previous prime is 420271. The next prime is 420293. The reversal of 420275 is 572024.

It is not a de Polignac number, because 420275 - 2² = 420271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8381 + ... + 8430.

It is an arithmetic number, because the mean of its divisors is an integer number (86862).

2⁴²⁰²⁷⁵ is an apocalyptic number.

420275 is a deficient number, since it is larger than the sum of its proper divisors (100897).

420275 is a wasteful number, since it uses less digits than its factorization.

420275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16821 (or 16816 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 420275 is about 648.2862022286. The cubic root of 420275 is about 74.9050650673.

Adding to 420275 its reverse (572024), we get a palindrome (992299).

The spelling of 420275 in words is "four hundred twenty thousand, two hundred seventy-five".