12481421 has 2 divisors, whose sum is σ = 12481422. Its totient is φ = 12481420.

The previous prime is 12481409. The next prime is 12481429. The reversal of 12481421 is 12418421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12348196 + 133225 = 3514^2 + 365^2 .

It is a cyclic number.

It is not a de Polignac number, because 12481421 - 2²² = 8287117 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12481429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6240710 + 6240711.

It is an arithmetic number, because the mean of its divisors is an integer number (6240711).

Almost surely, 2^12481421 is an apocalyptic number.

It is an amenable number.

12481421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12481421 is an equidigital number, since it uses as much as digits as its factorization.

12481421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 512, while the sum is 23.

The square root of 12481421 is about 3532.9054615146. The cubic root of 12481421 is about 231.9644032286.

Adding to 12481421 its reverse (12418421), we get a palindrome (24899842).

The spelling of 12481421 in words is "twelve million, four hundred eighty-one thousand, four hundred twenty-one".