554821 has 2 divisors, whose sum is σ = 554822. Its totient is φ = 554820.

The previous prime is 554803. The next prime is 554833. The reversal of 554821 is 128455.

554821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 314721 + 240100 = 561^2 + 490^2 .

It is a cyclic number.

It is not a de Polignac number, because 554821 - 2⁵ = 554789 is a prime.

554821 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (554891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277410 + 277411.

It is an arithmetic number, because the mean of its divisors is an integer number (277411).

2⁵⁵⁴⁸²¹ is an apocalyptic number.

It is an amenable number.

554821 is a deficient number, since it is larger than the sum of its proper divisors (1).

554821 is an equidigital number, since it uses as much as digits as its factorization.

554821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1600, while the sum is 25.

The square root of 554821 is about 744.8630746654. The cubic root of 554821 is about 82.1708217686.

The spelling of 554821 in words is "five hundred fifty-four thousand, eight hundred twenty-one".