170123 has 2 divisors, whose sum is σ = 170124. Its totient is φ = 170122.

The previous prime is 170111. The next prime is 170141. The reversal of 170123 is 321071.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 170123 - 2¹² = 166027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 170098 and 170107.

It is not a weakly prime, because it can be changed into another prime (176123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85061 + 85062.

It is an arithmetic number, because the mean of its divisors is an integer number (85062).

2¹⁷⁰¹²³ is an apocalyptic number.

170123 is a deficient number, since it is larger than the sum of its proper divisors (1).

170123 is an equidigital number, since it uses as much as digits as its factorization.

170123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42, while the sum is 14.

The square root of 170123 is about 412.4596950006. The cubic root of 170123 is about 55.4099396989.

Adding to 170123 its reverse (321071), we get a palindrome (491194).

It can be divided in two parts, 170 and 123, that multiplied together give a triangular number (20910 = T₂₀₄).

The spelling of 170123 in words is "one hundred seventy thousand, one hundred twenty-three", and thus it is an iban number.