12123407 has 4 divisors (see below), whose sum is σ = 12132696. Its totient is φ = 12114120.

The previous prime is 12123373. The next prime is 12123439. The reversal of 12123407 is 70432121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 70432121 = 103 ⋅683807.

It is a cyclic number.

It is not a de Polignac number, because 12123407 - 2⁸ = 12123151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2288 + ... + 5429.

It is an arithmetic number, because the mean of its divisors is an integer number (3033174).

Almost surely, 2^12123407 is an apocalyptic number.

12123407 is a deficient number, since it is larger than the sum of its proper divisors (9289).

12123407 is an equidigital number, since it uses as much as digits as its factorization.

12123407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9288.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 12123407 is about 3481.8683203131. The cubic root of 12123407 is about 229.7249831958.

Adding to 12123407 its reverse (70432121), we get a palindrome (82555528).

The spelling of 12123407 in words is "twelve million, one hundred twenty-three thousand, four hundred seven".