12436381 has 2 divisors, whose sum is σ = 12436382. Its totient is φ = 12436380.

The previous prime is 12436373. The next prime is 12436387. The reversal of 12436381 is 18363421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12320100 + 116281 = 3510^2 + 341^2 .

It is a cyclic number.

It is not a de Polignac number, because 12436381 - 2³ = 12436373 is a prime.

It is a super-2 number, since 2×12436381² = 309327144754322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12436387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6218190 + 6218191.

It is an arithmetic number, because the mean of its divisors is an integer number (6218191).

Almost surely, 2^12436381 is an apocalyptic number.

It is an amenable number.

12436381 is a deficient number, since it is larger than the sum of its proper divisors (1).

12436381 is an equidigital number, since it uses as much as digits as its factorization.

12436381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 28.

The square root of 12436381 is about 3526.5253437343. The cubic root of 12436381 is about 231.6850475096.

The spelling of 12436381 in words is "twelve million, four hundred thirty-six thousand, three hundred eighty-one".