240005123 has 2 divisors, whose sum is σ = 240005124. Its totient is φ = 240005122.

The previous prime is 240005119. The next prime is 240005137. The reversal of 240005123 is 321500042.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 240005123 - 2² = 240005119 is a prime.

It is not a weakly prime, because it can be changed into another prime (240005113) 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, 120002561 + 120002562.

It is an arithmetic number, because the mean of its divisors is an integer number (120002562).

Almost surely, 2^240005123 is an apocalyptic number.

240005123 is a deficient number, since it is larger than the sum of its proper divisors (1).

240005123 is an equidigital number, since it uses as much as digits as its factorization.

240005123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 240005123 is about 15492.0987280613. The cubic root of 240005123 is about 621.4509229238.

Adding to 240005123 its reverse (321500042), we get a palindrome (561505165).

The spelling of 240005123 in words is "two hundred forty million, five thousand, one hundred twenty-three".