420500503 has 4 divisors (see below), whose sum is σ = 420542248. Its totient is φ = 420458760.

The previous prime is 420500501. The next prime is 420500519. The reversal of 420500503 is 305005024.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 420500503 - 2¹ = 420500501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420500501) 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, 4600 + ... + 29362.

It is an arithmetic number, because the mean of its divisors is an integer number (105135562).

Almost surely, 2^420500503 is an apocalyptic number.

420500503 is a deficient number, since it is larger than the sum of its proper divisors (41745).

420500503 is a wasteful number, since it uses less digits than its factorization.

420500503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41744.

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 420500503 is about 20506.1089190514. The cubic root of 420500503 is about 749.1845970713.

Adding to 420500503 its reverse (305005024), we get a palindrome (725505527).

The spelling of 420500503 in words is "four hundred twenty million, five hundred thousand, five hundred three".