12259381 has 2 divisors, whose sum is σ = 12259382. Its totient is φ = 12259380.

The previous prime is 12259367. The next prime is 12259399. The reversal of 12259381 is 18395221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9979281 + 2280100 = 3159^2 + 1510^2 .

It is a cyclic number.

It is not a de Polignac number, because 12259381 - 2²³ = 3870773 is a prime.

It is a super-2 number, since 2×12259381² = 300584845006322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12259361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6129690 + 6129691.

It is an arithmetic number, because the mean of its divisors is an integer number (6129691).

Almost surely, 2^12259381 is an apocalyptic number.

It is an amenable number.

12259381 is a deficient number, since it is larger than the sum of its proper divisors (1).

12259381 is an equidigital number, since it uses as much as digits as its factorization.

12259381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 31.

The square root of 12259381 is about 3501.3398863864. The cubic root of 12259381 is about 230.5806438100.

The spelling of 12259381 in words is "twelve million, two hundred fifty-nine thousand, three hundred eighty-one".