504721 has 4 divisors (see below), whose sum is σ = 576832. Its totient is φ = 432612.

The previous prime is 504683. The next prime is 504727. The reversal of 504721 is 127405.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 504721 - 2⁷ = 504593 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (504727) 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 3 ways as a sum of consecutive naturals, for example, 36045 + ... + 36058.

It is an arithmetic number, because the mean of its divisors is an integer number (144208).

2⁵⁰⁴⁷²¹ is an apocalyptic number.

It is an amenable number.

504721 is a deficient number, since it is larger than the sum of its proper divisors (72111).

504721 is an equidigital number, since it uses as much as digits as its factorization.

504721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72110.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 504721 is about 710.4371893419. The cubic root of 504721 is about 79.6190744925.

It can be divided in two parts, 504 and 721, that added together give a triangular number (1225 = T₄₉).

The spelling of 504721 in words is "five hundred four thousand, seven hundred twenty-one".