556123 has 2 divisors, whose sum is σ = 556124. Its totient is φ = 556122.

The previous prime is 556103. The next prime is 556159. The reversal of 556123 is 321655.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-556123 is a prime.

It is a super-2 number, since 2×556123² = 618545582258, which contains 22 as substring.

556123 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 556094 and 556103.

It is not a weakly prime, because it can be changed into another prime (556103) 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 as a sum of consecutive naturals, namely, 278061 + 278062.

It is an arithmetic number, because the mean of its divisors is an integer number (278062).

2⁵⁵⁶¹²³ is an apocalyptic number.

556123 is a deficient number, since it is larger than the sum of its proper divisors (1).

556123 is an equidigital number, since it uses as much as digits as its factorization.

556123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 900, while the sum is 22.

The square root of 556123 is about 745.7365486551. The cubic root of 556123 is about 82.2350483873.

Adding to 556123 its reverse (321655), we get a palindrome (877778).

The spelling of 556123 in words is "five hundred fifty-six thousand, one hundred twenty-three".