65123 has 2 divisors, whose sum is σ = 65124. Its totient is φ = 65122.

The previous prime is 65119. The next prime is 65129. The reversal of 65123 is 32156.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65123 - 2² = 65119 is a prime.

It is a plaindrome in base 15.

It is a nialpdrome in base 16.

It is a zygodrome in base 2.

It is not a weakly prime, because it can be changed into another prime (65129) 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, 32561 + 32562.

It is an arithmetic number, because the mean of its divisors is an integer number (32562).

2⁶⁵¹²³ is an apocalyptic number.

65123 is a deficient number, since it is larger than the sum of its proper divisors (1).

65123 is an equidigital number, since it uses as much as digits as its factorization.

65123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 180, while the sum is 17.

The square root of 65123 is about 255.1920845167. The cubic root of 65123 is about 40.2326031064.

Adding to 65123 its reverse (32156), we get a palindrome (97279).

The spelling of 65123 in words is "sixty-five thousand, one hundred twenty-three".