503421 has 8 divisors (see below), whose sum is σ = 710784. Its totient is φ = 315840.

The previous prime is 503413. The next prime is 503423. The reversal of 503421 is 124305.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 503421 - 2³ = 503413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 503421.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 503421.

It is not an unprimeable number, because it can be changed into a prime (503423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4885 + ... + 4986.

It is an arithmetic number, because the mean of its divisors is an integer number (88848).

2⁵⁰³⁴²¹ is an apocalyptic number.

503421 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

503421 is a deficient number, since it is larger than the sum of its proper divisors (207363).

503421 is a wasteful number, since it uses less digits than its factorization.

503421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9891.

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

The square root of 503421 is about 709.5216698593. The cubic root of 503421 is about 79.5506579552.

Adding to 503421 its reverse (124305), we get a palindrome (627726).

The spelling of 503421 in words is "five hundred three thousand, four hundred twenty-one".