504661 has 2 divisors, whose sum is σ = 504662. Its totient is φ = 504660.

The previous prime is 504631. The next prime is 504667. The reversal of 504661 is 166405.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 476100 + 28561 = 690^2 + 169^2 .

It is a cyclic number.

It is not a de Polignac number, because 504661 - 2⁹ = 504149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (504667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252330 + 252331.

It is an arithmetic number, because the mean of its divisors is an integer number (252331).

2⁵⁰⁴⁶⁶¹ is an apocalyptic number.

It is an amenable number.

504661 is a deficient number, since it is larger than the sum of its proper divisors (1).

504661 is an equidigital number, since it uses as much as digits as its factorization.

504661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 504661 is about 710.3949605677. The cubic root of 504661 is about 79.6159193937.

The spelling of 504661 in words is "five hundred four thousand, six hundred sixty-one".