12181363 has 4 divisors (see below), whose sum is σ = 12601440. Its totient is φ = 11761288.

The previous prime is 12181343. The next prime is 12181369. The reversal of 12181363 is 36318121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12181363 - 2⁹ = 12180851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12181369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209995 + ... + 210052.

It is an arithmetic number, because the mean of its divisors is an integer number (3150360).

Almost surely, 2^12181363 is an apocalyptic number.

12181363 is a deficient number, since it is larger than the sum of its proper divisors (420077).

12181363 is an equidigital number, since it uses as much as digits as its factorization.

12181363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420076.

The product of its digits is 864, while the sum is 25.

The square root of 12181363 is about 3490.1809408683. The cubic root of 12181363 is about 230.0904685061.

Adding to 12181363 its reverse (36318121), we get a palindrome (48499484).

It can be divided in two parts, 12181 and 363, that added together give a square (12544 = 112²).

The spelling of 12181363 in words is "twelve million, one hundred eighty-one thousand, three hundred sixty-three".