12270245 has 16 divisors (see below), whose sum is σ = 15965040. Its totient is φ = 9052992.

The previous prime is 12270241. The next prime is 12270281. The reversal of 12270245 is 54207221.

12270245 = 181² + 182² + ... + 349².

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 11607649 + 662596 = 3407^2 + 814^2 .

It is not a de Polignac number, because 12270245 - 2² = 12270241 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12270245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12270241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10427 + ... + 11543.

It is an arithmetic number, because the mean of its divisors is an integer number (997815).

Almost surely, 2^12270245 is an apocalyptic number.

It is an amenable number.

12270245 is a deficient number, since it is larger than the sum of its proper divisors (3694795).

12270245 is an equidigital number, since it uses as much as digits as its factorization.

12270245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161 (or 1135 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 12270245 is about 3502.8909489163. The cubic root of 12270245 is about 230.6487355707.

Adding to 12270245 its reverse (54207221), we get a palindrome (66477466).

The spelling of 12270245 in words is "twelve million, two hundred seventy thousand, two hundred forty-five".