503040421 has 8 divisors (see below), whose sum is σ = 573602904. Its totient is φ = 437030400.

The previous prime is 503040397. The next prime is 503040427. The reversal of 503040421 is 124040305.

It can be written as a sum of positive squares in 4 ways, for example, as 15249025 + 487791396 = 3905^2 + 22086^2 .

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 503040421 - 2¹¹ = 503038373 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 (503040427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1137880 + ... + 1138321.

It is an arithmetic number, because the mean of its divisors is an integer number (71700363).

Almost surely, 2^503040421 is an apocalyptic number.

It is an amenable number.

503040421 is a deficient number, since it is larger than the sum of its proper divisors (70562483).

503040421 is a wasteful number, since it uses less digits than its factorization.

503040421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276231.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 503040421 is about 22428.5626155579. The cubic root of 503040421 is about 795.3060651896.

Adding to 503040421 its reverse (124040305), we get a palindrome (627080726).

It can be divided in two parts, 5030 and 40421, that added together give a triangular number (45451 = T₃₀₁).

The spelling of 503040421 in words is "five hundred three million, forty thousand, four hundred twenty-one".