123106 has 4 divisors (see below), whose sum is σ = 184662. Its totient is φ = 61552.

The previous prime is 123091. The next prime is 123113. The reversal of 123106 is 601321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 601321 = 7 ⋅85903.

It can be written as a sum of positive squares in only one way, i.e., 65025 + 58081 = 255^2 + 241^2 .

It is an unprimeable number.

123106 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30775 + ... + 30778.

2¹²³¹⁰⁶ is an apocalyptic number.

123106 is a deficient number, since it is larger than the sum of its proper divisors (61556).

123106 is an equidigital number, since it uses as much as digits as its factorization.

123106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61555.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 123106 is about 350.8646462669. The cubic root of 123106 is about 49.7461803588.

Adding to 123106 its reverse (601321), we get a palindrome (724427).

The spelling of 123106 in words is "one hundred twenty-three thousand, one hundred six".