12355381 has 2 divisors, whose sum is σ = 12355382. Its totient is φ = 12355380.

The previous prime is 12355361. The next prime is 12355411. The reversal of 12355381 is 18355321.

12355381 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12013156 + 342225 = 3466^2 + 585^2 .

It is a cyclic number.

It is not a de Polignac number, because 12355381 - 2⁷ = 12355253 is a prime.

It is a super-2 number, since 2×12355381² = 305310879310322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12355331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6177690 + 6177691.

It is an arithmetic number, because the mean of its divisors is an integer number (6177691).

Almost surely, 2^12355381 is an apocalyptic number.

It is an amenable number.

12355381 is a deficient number, since it is larger than the sum of its proper divisors (1).

12355381 is an equidigital number, since it uses as much as digits as its factorization.

12355381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 28.

The square root of 12355381 is about 3515.0221905416. The cubic root of 12355381 is about 231.1809517738.

The spelling of 12355381 in words is "twelve million, three hundred fifty-five thousand, three hundred eighty-one".