103145123 has 2 divisors, whose sum is σ = 103145124. Its totient is φ = 103145122.

The previous prime is 103145117. The next prime is 103145149. The reversal of 103145123 is 321541301.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 103145123 - 2⁶ = 103145059 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 103145095 and 103145104.

It is not a weakly prime, because it can be changed into another prime (103145113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51572561 + 51572562.

It is an arithmetic number, because the mean of its divisors is an integer number (51572562).

Almost surely, 2^103145123 is an apocalyptic number.

103145123 is a deficient number, since it is larger than the sum of its proper divisors (1).

103145123 is an equidigital number, since it uses as much as digits as its factorization.

103145123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 103145123 is about 10156.0387454952. The cubic root of 103145123 is about 468.9748638941.

Adding to 103145123 its reverse (321541301), we get a palindrome (424686424).

The spelling of 103145123 in words is "one hundred three million, one hundred forty-five thousand, one hundred twenty-three".