12805147 has 2 divisors, whose sum is σ = 12805148. Its totient is φ = 12805146.

The previous prime is 12805141. The next prime is 12805187. The reversal of 12805147 is 74150821.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12805147 is a prime.

It is equal to p₈₃₇₄₁₅ and since 12805147 and 837415 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (12805141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6402573 + 6402574.

It is an arithmetic number, because the mean of its divisors is an integer number (6402574).

Almost surely, 2^12805147 is an apocalyptic number.

12805147 is a deficient number, since it is larger than the sum of its proper divisors (1).

12805147 is an equidigital number, since it uses as much as digits as its factorization.

12805147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 12805147 is about 3578.4280068209. The cubic root of 12805147 is about 233.9527688539.

Adding to 12805147 its reverse (74150821), we get a palindrome (86955968).

The spelling of 12805147 in words is "twelve million, eight hundred five thousand, one hundred forty-seven".