12481409 has 2 divisors, whose sum is σ = 12481410. Its totient is φ = 12481408.

The previous prime is 12481379. The next prime is 12481421. The reversal of 12481409 is 90418421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9591409 + 2890000 = 3097^2 + 1700^2 .

It is a cyclic number.

It is not a de Polignac number, because 12481409 - 2⁸ = 12481153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12481429) 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, 6240704 + 6240705.

It is an arithmetic number, because the mean of its divisors is an integer number (6240705).

Almost surely, 2^12481409 is an apocalyptic number.

It is an amenable number.

12481409 is a deficient number, since it is larger than the sum of its proper divisors (1).

12481409 is an equidigital number, since it uses as much as digits as its factorization.

12481409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 12481409 is about 3532.9037631954. The cubic root of 12481409 is about 231.9643288894.

The spelling of 12481409 in words is "twelve million, four hundred eighty-one thousand, four hundred nine".