12521243 has 8 divisors (see below), whose sum is σ = 14803680. Its totient is φ = 10362240.

The previous prime is 12521239. The next prime is 12521291. The reversal of 12521243 is 34212521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12521243 - 2² = 12521239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12521203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30638 + ... + 31043.

It is an arithmetic number, because the mean of its divisors is an integer number (1850460).

Almost surely, 2^12521243 is an apocalyptic number.

12521243 is a deficient number, since it is larger than the sum of its proper divisors (2282437).

12521243 is an equidigital number, since it uses as much as digits as its factorization.

12521243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61717.

The product of its digits is 480, while the sum is 20.

The square root of 12521243 is about 3538.5368445164. The cubic root of 12521243 is about 232.2108356388.

Adding to 12521243 its reverse (34212521), we get a palindrome (46733764).

The spelling of 12521243 in words is "twelve million, five hundred twenty-one thousand, two hundred forty-three".