12368581 has 2 divisors, whose sum is σ = 12368582. Its totient is φ = 12368580.

The previous prime is 12368579. The next prime is 12368591. The reversal of 12368581 is 18586321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8946081 + 3422500 = 2991^2 + 1850^2 .

It is a cyclic number.

It is not a de Polignac number, because 12368581 - 2¹ = 12368579 is a prime.

It is a super-2 number, since 2×12368581² = 305963591907122, which contains 22 as substring.

Together with 12368579, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12368591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6184290 + 6184291.

It is an arithmetic number, because the mean of its divisors is an integer number (6184291).

Almost surely, 2^12368581 is an apocalyptic number.

It is an amenable number.

12368581 is a deficient number, since it is larger than the sum of its proper divisors (1).

12368581 is an equidigital number, since it uses as much as digits as its factorization.

12368581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 34.

The square root of 12368581 is about 3516.8993445932. The cubic root of 12368581 is about 231.2632506651.

The spelling of 12368581 in words is "twelve million, three hundred sixty-eight thousand, five hundred eighty-one".