503421000 has 128 divisors (see below), whose sum is σ = 1663234560. Its totient is φ = 126336000.

The previous prime is 503420933. The next prime is 503421029. The reversal of 503421000 is 124305.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46065 + ... + 55935.

It is an arithmetic number, because the mean of its divisors is an integer number (12994020).

Almost surely, 2^503421000 is an apocalyptic number.

503421000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 503421000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (831617280).

503421000 is an abundant number, since it is smaller than the sum of its proper divisors (1159813560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

503421000 is a wasteful number, since it uses less digits than its factorization.

503421000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9912 (or 9898 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 503421000 is about 22437.0452600159. The cubic root of 503421000 is about 795.5065795522.

Adding to 503421000 its reverse (124305), we get a palindrome (503545305).

The spelling of 503421000 in words is "five hundred three million, four hundred twenty-one thousand".