420003 has 12 divisors (see below), whose sum is σ = 633360. Its totient is φ = 267696.

The previous prime is 420001. The next prime is 420029. The reversal of 420003 is 300024.

It is not a de Polignac number, because 420003 - 2¹ = 420001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

420003 is a lucky number.

It is a zygodrome in base 7.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 420003.

It is not an unprimeable number, because it can be changed into a prime (420001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 808 + ... + 1221.

It is an arithmetic number, because the mean of its divisors is an integer number (52780).

2⁴²⁰⁰⁰³ is an apocalyptic number.

420003 is a deficient number, since it is larger than the sum of its proper divisors (213357).

420003 is a wasteful number, since it uses less digits than its factorization.

420003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2058 (or 2055 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 9.

The square root of 420003 is about 648.0763843869. The cubic root of 420003 is about 74.8889021782. Note that the first 3 decimals are identical.

Adding to 420003 its reverse (300024), we get a palindrome (720027).

The spelling of 420003 in words is "four hundred twenty thousand, three", and thus it is an iban number.