126123 has 8 divisors (see below), whose sum is σ = 178128. Its totient is φ = 79104.

The previous prime is 126107. The next prime is 126127. The reversal of 126123 is 321621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 126123 - 2⁴ = 126107 is a prime.

It is a super-2 number, since 2×126123² = 31814022258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1186 + ... + 1287.

It is an arithmetic number, because the mean of its divisors is an integer number (22266).

2¹²⁶¹²³ is an apocalyptic number.

126123 is a deficient number, since it is larger than the sum of its proper divisors (52005).

126123 is a wasteful number, since it uses less digits than its factorization.

126123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2493.

The product of its digits is 72, while the sum is 15.

The square root of 126123 is about 355.1380013460. The cubic root of 126123 is about 50.1492871566.

Adding to 126123 its reverse (321621), we get a palindrome (447744).

The spelling of 126123 in words is "one hundred twenty-six thousand, one hundred twenty-three".