420203 has 4 divisors (see below), whose sum is σ = 480240. Its totient is φ = 360168.

The previous prime is 420193. The next prime is 420221. The reversal of 420203 is 302024.

420203 = 242² + 243² + ... + 248².

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420203 - 2¹² = 416107 is a prime.

It is a super-2 number, since 2×420203² = 353141122418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420253) 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 3 ways as a sum of consecutive naturals, for example, 30008 + ... + 30021.

It is an arithmetic number, because the mean of its divisors is an integer number (120060).

2⁴²⁰²⁰³ is an apocalyptic number.

420203 is a deficient number, since it is larger than the sum of its proper divisors (60037).

420203 is an equidigital number, since it uses as much as digits as its factorization.

420203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60036.

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 420203 is about 648.2306688209. The cubic root of 420203 is about 74.9007873343.

Adding to 420203 its reverse (302024), we get a palindrome (722227).

The spelling of 420203 in words is "four hundred twenty thousand, two hundred three", and thus it is an iban number.