503123421 has 8 divisors (see below), whose sum is σ = 671052384. Its totient is φ = 335305040.

The previous prime is 503123419. The next prime is 503123443. The reversal of 503123421 is 124321305.

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

It is a cyclic number.

It is not a de Polignac number, because 503123421 - 2¹ = 503123419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (503123921) 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, 16371 + ... + 35696.

It is an arithmetic number, because the mean of its divisors is an integer number (83881548).

Almost surely, 2^503123421 is an apocalyptic number.

It is an amenable number.

503123421 is a deficient number, since it is larger than the sum of its proper divisors (167928963).

503123421 is a wasteful number, since it uses less digits than its factorization.

503123421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55291.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 503123421 is about 22430.4128584384. The cubic root of 503123421 is about 795.3498037379.

Adding to 503123421 its reverse (124321305), we get a palindrome (627444726).

The spelling of 503123421 in words is "five hundred three million, one hundred twenty-three thousand, four hundred twenty-one".