12123305 has 8 divisors (see below), whose sum is σ = 15049800. Its totient is φ = 9364096.

The previous prime is 12123299. The next prime is 12123317. The reversal of 12123305 is 50332121.

It can be written as a sum of positive squares in 4 ways, for example, as 583696 + 11539609 = 764^2 + 3397^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12123305 - 2¹⁴ = 12106921 is a prime.

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, 41660 + ... + 41949.

It is an arithmetic number, because the mean of its divisors is an integer number (1881225).

Almost surely, 2^12123305 is an apocalyptic number.

It is an amenable number.

12123305 is a deficient number, since it is larger than the sum of its proper divisors (2926495).

12123305 is an equidigital number, since it uses as much as digits as its factorization.

12123305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83643.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 12123305 is about 3481.8536729736. The cubic root of 12123305 is about 229.7243389321.

Adding to 12123305 its reverse (50332121), we get a palindrome (62455426).

The spelling of 12123305 in words is "twelve million, one hundred twenty-three thousand, three hundred five".