12123445 has 8 divisors (see below), whose sum is σ = 14787000. Its totient is φ = 9539520.

The previous prime is 12123439. The next prime is 12123467. The reversal of 12123445 is 54432121.

It can be written as a sum of positive squares in 4 ways, for example, as 303601 + 11819844 = 551^2 + 3438^2 .

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

It is not a de Polignac number, because 12123445 - 2⁷ = 12123317 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19570 + ... + 20179.

It is an arithmetic number, because the mean of its divisors is an integer number (1848375).

Almost surely, 2^12123445 is an apocalyptic number.

It is an amenable number.

12123445 is a deficient number, since it is larger than the sum of its proper divisors (2663555).

12123445 is an equidigital number, since it uses as much as digits as its factorization.

12123445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39815.

The product of its digits is 960, while the sum is 22.

The square root of 12123445 is about 3481.8737771493. The cubic root of 12123445 is about 229.7252232147.

Adding to 12123445 its reverse (54432121), we get a palindrome (66555566).

The spelling of 12123445 in words is "twelve million, one hundred twenty-three thousand, four hundred forty-five".