420503 has 2 divisors, whose sum is σ = 420504. Its totient is φ = 420502.

The previous prime is 420499. The next prime is 420521. The reversal of 420503 is 305024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420503 - 2² = 420499 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420593) 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, 210251 + 210252.

It is an arithmetic number, because the mean of its divisors is an integer number (210252).

2⁴²⁰⁵⁰³ is an apocalyptic number.

420503 is a deficient number, since it is larger than the sum of its proper divisors (1).

420503 is an equidigital number, since it uses as much as digits as its factorization.

420503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 420503 is about 648.4620266446. The cubic root of 420503 is about 74.9186079995.

Adding to 420503 its reverse (305024), we get a palindrome (725527).

The spelling of 420503 in words is "four hundred twenty thousand, five hundred three".