420803 has 2 divisors, whose sum is σ = 420804. Its totient is φ = 420802.

The previous prime is 420799. The next prime is 420809. The reversal of 420803 is 308024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420803 - 2² = 420799 is a prime.

It is not a weakly prime, because it can be changed into another prime (420809) 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 as a sum of consecutive naturals, namely, 210401 + 210402.

It is an arithmetic number, because the mean of its divisors is an integer number (210402).

2⁴²⁰⁸⁰³ is an apocalyptic number.

420803 is a deficient number, since it is larger than the sum of its proper divisors (1).

420803 is an equidigital number, since it uses as much as digits as its factorization.

420803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 420803 is about 648.6933019540. The cubic root of 420803 is about 74.9364201907.

Adding to 420803 its reverse (308024), we get a palindrome (728827).

The spelling of 420803 in words is "four hundred twenty thousand, eight hundred three".