12543407 has 8 divisors (see below), whose sum is σ = 13158336. Its totient is φ = 11943072.

The previous prime is 12543397. The next prime is 12543413. The reversal of 12543407 is 70434521.

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 12543407 - 2⁸ = 12543151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12543497) by changing a digit.

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, 1868 + ... + 5345.

It is an arithmetic number, because the mean of its divisors is an integer number (1644792).

Almost surely, 2^12543407 is an apocalyptic number.

12543407 is a deficient number, since it is larger than the sum of its proper divisors (614929).

12543407 is an equidigital number, since it uses as much as digits as its factorization.

12543407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7297.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 12543407 is about 3541.6672627450. The cubic root of 12543407 is about 232.3477679222.

Adding to 12543407 its reverse (70434521), we get a palindrome (82977928).

The spelling of 12543407 in words is "twelve million, five hundred forty-three thousand, four hundred seven".