12123406 has 8 divisors (see below), whose sum is σ = 19142280. Its totient is φ = 5742648.

The previous prime is 12123373. The next prime is 12123439. The reversal of 12123406 is 60432121.

It is an interprime number because it is at equal distance from previous prime (12123373) and next prime (12123439).

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

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159481 + ... + 159556.

It is an arithmetic number, because the mean of its divisors is an integer number (2392785).

Almost surely, 2^12123406 is an apocalyptic number.

12123406 is a deficient number, since it is larger than the sum of its proper divisors (7018874).

12123406 is a wasteful number, since it uses less digits than its factorization.

12123406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319058.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 12123406 is about 3481.8681767120. The cubic root of 12123406 is about 229.7249768795.

Adding to 12123406 its reverse (60432121), we get a palindrome (72555527).

The spelling of 12123406 in words is "twelve million, one hundred twenty-three thousand, four hundred six".