140542123 has 2 divisors, whose sum is σ = 140542124. Its totient is φ = 140542122.

The previous prime is 140542117. The next prime is 140542147. The reversal of 140542123 is 321245041.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140542123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 140542094 and 140542103.

It is not a weakly prime, because it can be changed into another prime (140542163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70271061 + 70271062.

It is an arithmetic number, because the mean of its divisors is an integer number (70271062).

Almost surely, 2^140542123 is an apocalyptic number.

140542123 is a deficient number, since it is larger than the sum of its proper divisors (1).

140542123 is an equidigital number, since it uses as much as digits as its factorization.

140542123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 140542123 is about 11855.0463094836. The cubic root of 140542123 is about 519.9187779946.

Adding to 140542123 its reverse (321245041), we get a palindrome (461787164).

The spelling of 140542123 in words is "one hundred forty million, five hundred forty-two thousand, one hundred twenty-three".