504561 has 8 divisors (see below), whose sum is σ = 679360. Its totient is φ = 333072.

The previous prime is 504547. The next prime is 504563. The reversal of 504561 is 165405.

It is a happy number.

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

It is not a de Polignac number, because 504561 - 2¹⁷ = 373489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (504563) 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, 445 + ... + 1098.

It is an arithmetic number, because the mean of its divisors is an integer number (84920).

2⁵⁰⁴⁵⁶¹ is an apocalyptic number.

It is an amenable number.

504561 is a deficient number, since it is larger than the sum of its proper divisors (174799).

504561 is a wasteful number, since it uses less digits than its factorization.

504561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 504561 is about 710.3245736985. The cubic root of 504561 is about 79.6106603401.

Adding to 504561 its reverse (165405), we get a palindrome (669966).

The spelling of 504561 in words is "five hundred four thousand, five hundred sixty-one".