420270 has 16 divisors (see below), whose sum is σ = 1008720. Its totient is φ = 112064.

The previous prime is 420269. The next prime is 420271. The reversal of 420270 is 72024.

It is an interprime number because it is at equal distance from previous prime (420269) and next prime (420271).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a plaindrome in base 16.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 6975 + ... + 7034.

It is an arithmetic number, because the mean of its divisors is an integer number (63045).

2⁴²⁰²⁷⁰ is an apocalyptic number.

420270 is an abundant number, since it is smaller than the sum of its proper divisors (588450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

420270 is a wasteful number, since it uses less digits than its factorization.

420270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14019.

The product of its (nonzero) digits is 112, while the sum is 15.

The square root of 420270 is about 648.2823458957. The cubic root of 420270 is about 74.9047680183.

Adding to 420270 its reverse (72024), we get a palindrome (492294).

The spelling of 420270 in words is "four hundred twenty thousand, two hundred seventy", and thus it is an iban number.