12312145 has 8 divisors (see below), whose sum is σ = 14812200. Its totient is φ = 9824640.

The previous prime is 12312143. The next prime is 12312149. The reversal of 12312145 is 54121321.

It can be written as a sum of positive squares in 4 ways, for example, as 173889 + 12138256 = 417^2 + 3484^2 .

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

It is not a de Polignac number, because 12312145 - 2¹ = 12312143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12312143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 820 + ... + 5029.

It is an arithmetic number, because the mean of its divisors is an integer number (1851525).

Almost surely, 2^12312145 is an apocalyptic number.

It is an amenable number.

12312145 is a deficient number, since it is larger than the sum of its proper divisors (2500055).

12312145 is an equidigital number, since it uses as much as digits as its factorization.

12312145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6275.

The product of its digits is 240, while the sum is 19.

The square root of 12312145 is about 3508.8666261344. The cubic root of 12312145 is about 230.9109743589.

Adding to 12312145 its reverse (54121321), we get a palindrome (66433466).

The spelling of 12312145 in words is "twelve million, three hundred twelve thousand, one hundred forty-five".