140005123 has 2 divisors, whose sum is σ = 140005124. Its totient is φ = 140005122.

The previous prime is 140005121. The next prime is 140005133. The reversal of 140005123 is 321500041.

It is a weak prime.

It is an emirp because it is prime and its reverse (321500041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140005123 - 2¹ = 140005121 is a prime.

Together with 140005121, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 140005097 and 140005106.

It is not a weakly prime, because it can be changed into another prime (140005121) 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, 70002561 + 70002562.

It is an arithmetic number, because the mean of its divisors is an integer number (70002562).

Almost surely, 2^140005123 is an apocalyptic number.

140005123 is a deficient number, since it is larger than the sum of its proper divisors (1).

140005123 is an equidigital number, since it uses as much as digits as its factorization.

140005123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 140005123 is about 11832.3760504812. The cubic root of 140005123 is about 519.2557437144.

Adding to 140005123 its reverse (321500041), we get a palindrome (461505164).

The spelling of 140005123 in words is "one hundred forty million, five thousand, one hundred twenty-three".