12845381 has 2 divisors, whose sum is σ = 12845382. Its totient is φ = 12845380.

The previous prime is 12845369. The next prime is 12845383. The reversal of 12845381 is 18354821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11282881 + 1562500 = 3359^2 + 1250^2 .

It is a cyclic number.

It is not a de Polignac number, because 12845381 - 2¹⁴ = 12828997 is a prime.

It is a super-2 number, since 2×12845381² = 330007626070322, which contains 22 as substring.

Together with 12845383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12845383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6422690 + 6422691.

It is an arithmetic number, because the mean of its divisors is an integer number (6422691).

Almost surely, 2^12845381 is an apocalyptic number.

It is an amenable number.

12845381 is a deficient number, since it is larger than the sum of its proper divisors (1).

12845381 is an equidigital number, since it uses as much as digits as its factorization.

12845381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7680, while the sum is 32.

The square root of 12845381 is about 3584.0453401150. The cubic root of 12845381 is about 234.1975405961.

The spelling of 12845381 in words is "twelve million, eight hundred forty-five thousand, three hundred eighty-one".