556243 has 2 divisors, whose sum is σ = 556244. Its totient is φ = 556242.

The previous prime is 556229. The next prime is 556253. The reversal of 556243 is 342655.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 556243 - 2⁵ = 556211 is a prime.

It is a d-powerful number, because it can be written as 5 + 5 + 2¹³ + 6³ + 4⁷ + 3¹² .

It is not a weakly prime, because it can be changed into another prime (556253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278121 + 278122.

It is an arithmetic number, because the mean of its divisors is an integer number (278122).

2⁵⁵⁶²⁴³ is an apocalyptic number.

556243 is a deficient number, since it is larger than the sum of its proper divisors (1).

556243 is an equidigital number, since it uses as much as digits as its factorization.

556243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 25.

The square root of 556243 is about 745.8170016834. The cubic root of 556243 is about 82.2409628440.

Adding to 556243 its reverse (342655), we get a palindrome (898898).

The spelling of 556243 in words is "five hundred fifty-six thousand, two hundred forty-three".