12383521 has 2 divisors, whose sum is σ = 12383522. Its totient is φ = 12383520.

The previous prime is 12383519. The next prime is 12383563. The reversal of 12383521 is 12538321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7700625 + 4682896 = 2775^2 + 2164^2 .

It is an emirp because it is prime and its reverse (12538321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12383521 - 2¹ = 12383519 is a prime.

Together with 12383519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12387521) 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, 6191760 + 6191761.

It is an arithmetic number, because the mean of its divisors is an integer number (6191761).

Almost surely, 2^12383521 is an apocalyptic number.

It is an amenable number.

12383521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12383521 is an equidigital number, since it uses as much as digits as its factorization.

12383521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 25.

The square root of 12383521 is about 3519.0227336577. The cubic root of 12383521 is about 231.3563274368.

The spelling of 12383521 in words is "twelve million, three hundred eighty-three thousand, five hundred twenty-one".