12685481 has 2 divisors, whose sum is σ = 12685482. Its totient is φ = 12685480.

The previous prime is 12685459. The next prime is 12685501. The reversal of 12685481 is 18458621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12673600 + 11881 = 3560^2 + 109^2 .

It is an emirp because it is prime and its reverse (18458621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12685481 is a prime.

It is a super-2 number, since 2×12685481² = 321842856402722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12685411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6342740 + 6342741.

It is an arithmetic number, because the mean of its divisors is an integer number (6342741).

Almost surely, 2^12685481 is an apocalyptic number.

It is an amenable number.

12685481 is a deficient number, since it is larger than the sum of its proper divisors (1).

12685481 is an equidigital number, since it uses as much as digits as its factorization.

12685481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15360, while the sum is 35.

The square root of 12685481 is about 3561.6682888781. The cubic root of 12685481 is about 233.2217123714.

The spelling of 12685481 in words is "twelve million, six hundred eighty-five thousand, four hundred eighty-one".