12315245 has 4 divisors (see below), whose sum is σ = 14778300. Its totient is φ = 9852192.

The previous prime is 12315241. The next prime is 12315253. The reversal of 12315245 is 54251321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5669161 + 6646084 = 2381^2 + 2578^2 .

It is a cyclic number.

It is not a de Polignac number, because 12315245 - 2² = 12315241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12315245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12315241) 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, 1231520 + ... + 1231529.

It is an arithmetic number, because the mean of its divisors is an integer number (3694575).

Almost surely, 2^12315245 is an apocalyptic number.

It is an amenable number.

12315245 is a deficient number, since it is larger than the sum of its proper divisors (2463055).

12315245 is an equidigital number, since it uses as much as digits as its factorization.

12315245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2463054.

The product of its digits is 1200, while the sum is 23.

The square root of 12315245 is about 3509.3083364105. The cubic root of 12315245 is about 230.9303526218.

Adding to 12315245 its reverse (54251321), we get a palindrome (66566566).

The spelling of 12315245 in words is "twelve million, three hundred fifteen thousand, two hundred forty-five".