12123126 has 24 divisors (see below), whose sum is σ = 26909064. Its totient is φ = 3942240.

The previous prime is 12123107. The next prime is 12123151. The reversal of 12123126 is 62132121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12123099 and 12123108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7476 + ... + 8951.

It is an arithmetic number, because the mean of its divisors is an integer number (1121211).

Almost surely, 2^12123126 is an apocalyptic number.

12123126 is an abundant number, since it is smaller than the sum of its proper divisors (14785938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12123126 is a wasteful number, since it uses less digits than its factorization.

12123126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16476 (or 16473 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 12123126 is about 3481.8279681799. The cubic root of 12123126 is about 229.7232083037.

Adding to 12123126 its reverse (62132121), we get a palindrome (74255247).

The spelling of 12123126 in words is "twelve million, one hundred twenty-three thousand, one hundred twenty-six".