12847381 has 2 divisors, whose sum is σ = 12847382. Its totient is φ = 12847380.

The previous prime is 12847369. The next prime is 12847397. The reversal of 12847381 is 18374821.

12847381 = 2534² + 2535².

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6426225 + 6421156 = 2535^2 + 2534^2 .

It is an emirp because it is prime and its reverse (18374821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12847381 - 2⁵ = 12847349 is a prime.

It is a super-2 number, since 2×12847381² = 330110397118322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12845381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6423690 + 6423691.

It is an arithmetic number, because the mean of its divisors is an integer number (6423691).

Almost surely, 2^12847381 is an apocalyptic number.

12847381 is the 2535-th centered square number.

It is an amenable number.

12847381 is a deficient number, since it is larger than the sum of its proper divisors (1).

12847381 is an equidigital number, since it uses as much as digits as its factorization.

12847381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 34.

The square root of 12847381 is about 3584.3243435828. The cubic root of 12847381 is about 234.2096946608.

The spelling of 12847381 in words is "twelve million, eight hundred forty-seven thousand, three hundred eighty-one".