8420503 has 12 divisors (see below), whose sum is σ = 10549560. Its totient is φ = 6661872.

The previous prime is 8420483. The next prime is 8420509. The reversal of 8420503 is 3050248.

It is not a de Polignac number, because 8420503 - 2¹³ = 8412311 is a prime.

8420503 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8420509) 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 11 ways as a sum of consecutive naturals, for example, 5973 + ... + 7246.

It is an arithmetic number, because the mean of its divisors is an integer number (879130).

Almost surely, 2^8420503 is an apocalyptic number.

8420503 is a deficient number, since it is larger than the sum of its proper divisors (2129057).

8420503 is a wasteful number, since it uses less digits than its factorization.

8420503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13246 (or 13239 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 8420503 is about 2901.8102970387. The cubic root of 8420503 is about 203.4445272556. Note that the first 3 decimals are identical.

The spelling of 8420503 in words is "eight million, four hundred twenty thousand, five hundred three".