102345123 has 4 divisors (see below), whose sum is σ = 136460168. Its totient is φ = 68230080.

The previous prime is 102345107. The next prime is 102345127. The reversal of 102345123 is 321543201.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 102345123 - 2⁴ = 102345107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102345123.

It is not an unprimeable number, because it can be changed into a prime (102345127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17057518 + ... + 17057523.

It is an arithmetic number, because the mean of its divisors is an integer number (34115042).

Almost surely, 2^102345123 is an apocalyptic number.

102345123 is a deficient number, since it is larger than the sum of its proper divisors (34115045).

102345123 is an equidigital number, since it uses as much as digits as its factorization.

102345123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34115044.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 102345123 is about 10116.5766443002. The cubic root of 102345123 is about 467.7592495754.

Adding to 102345123 its reverse (321543201), we get a palindrome (423888324).

The spelling of 102345123 in words is "one hundred two million, three hundred forty-five thousand, one hundred twenty-three".