12810145 has 4 divisors (see below), whose sum is σ = 15372180. Its totient is φ = 10248112.

The previous prime is 12810143. The next prime is 12810169. The reversal of 12810145 is 54101821.

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 3069504 + 9740641 = 1752^2 + 3121^2 .

It is a cyclic number.

It is not a de Polignac number, because 12810145 - 2¹ = 12810143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12810143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1281010 + ... + 1281019.

It is an arithmetic number, because the mean of its divisors is an integer number (3843045).

Almost surely, 2^12810145 is an apocalyptic number.

It is an amenable number.

12810145 is a deficient number, since it is larger than the sum of its proper divisors (2562035).

12810145 is an equidigital number, since it uses as much as digits as its factorization.

12810145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2562034.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 12810145 is about 3579.1262900322. The cubic root of 12810145 is about 233.9832030703.

Adding to 12810145 its reverse (54101821), we get a palindrome (66911966).

The spelling of 12810145 in words is "twelve million, eight hundred ten thousand, one hundred forty-five".