12531243 has 4 divisors (see below), whose sum is σ = 16708328. Its totient is φ = 8354160.

The previous prime is 12531221. The next prime is 12531247. The reversal of 12531243 is 34213521.

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

It is a de Polignac number, because none of the positive numbers 2^k-12531243 is a prime.

It is a super-2 number, since 2×12531243² = 314064102250098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12531247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2088538 + ... + 2088543.

It is an arithmetic number, because the mean of its divisors is an integer number (4177082).

Almost surely, 2^12531243 is an apocalyptic number.

12531243 is a deficient number, since it is larger than the sum of its proper divisors (4177085).

12531243 is an equidigital number, since it uses as much as digits as its factorization.

12531243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4177084.

The product of its digits is 720, while the sum is 21.

The square root of 12531243 is about 3539.9495759121. The cubic root of 12531243 is about 232.2726370231.

Adding to 12531243 its reverse (34213521), we get a palindrome (46744764).

The spelling of 12531243 in words is "twelve million, five hundred thirty-one thousand, two hundred forty-three".