12443257 has 8 divisors (see below), whose sum is σ = 12664736. Its totient is φ = 12223872.

The previous prime is 12443251. The next prime is 12443261. The reversal of 12443257 is 75234421.

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

It is a cyclic number.

It is not a de Polignac number, because 12443257 - 2⁷ = 12443129 is a prime.

It is the 3528-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12443251) by changing a digit.

It is a nontrivial repunit in base 3527.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15418 + ... + 16204.

It is an arithmetic number, because the mean of its divisors is an integer number (1583092).

Almost surely, 2^12443257 is an apocalyptic number.

It is an amenable number.

12443257 is a deficient number, since it is larger than the sum of its proper divisors (221479).

12443257 is an equidigital number, since it uses as much as digits as its factorization.

12443257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047.

The product of its digits is 6720, while the sum is 28.

The square root of 12443257 is about 3527.5001063076. The cubic root of 12443257 is about 231.7277387308.

Adding to 12443257 its reverse (75234421), we get a palindrome (87677678).

The spelling of 12443257 in words is "twelve million, four hundred forty-three thousand, two hundred fifty-seven".