12724241 has 4 divisors (see below), whose sum is σ = 12867300. Its totient is φ = 12581184.

The previous prime is 12724223. The next prime is 12724249. The reversal of 12724241 is 14242721.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1164241 + 11560000 = 1079^2 + 3400^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12724241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12724249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71396 + ... + 71573.

It is an arithmetic number, because the mean of its divisors is an integer number (3216825).

Almost surely, 2^12724241 is an apocalyptic number.

It is an amenable number.

12724241 is a deficient number, since it is larger than the sum of its proper divisors (143059).

12724241 is an equidigital number, since it uses as much as digits as its factorization.

12724241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143058.

The product of its digits is 896, while the sum is 23.

The square root of 12724241 is about 3567.1054091518. The cubic root of 12724241 is about 233.4590041850.

Adding to 12724241 its reverse (14242721), we get a palindrome (26966962).

The spelling of 12724241 in words is "twelve million, seven hundred twenty-four thousand, two hundred forty-one".