12531543 has 8 divisors (see below), whose sum is σ = 16758000. Its totient is φ = 8329728.

The previous prime is 12531539. The next prime is 12531553. The reversal of 12531543 is 34513521.

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

It is not a de Polignac number, because 12531543 - 2² = 12531539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12531553) 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, 4938 + ... + 7031.

It is an arithmetic number, because the mean of its divisors is an integer number (2094750).

Almost surely, 2^12531543 is an apocalyptic number.

12531543 is a deficient number, since it is larger than the sum of its proper divisors (4226457).

12531543 is a wasteful number, since it uses less digits than its factorization.

12531543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12321.

The product of its digits is 1800, while the sum is 24.

The square root of 12531543 is about 3539.9919491434. The cubic root of 12531543 is about 232.2744905566.

The spelling of 12531543 in words is "twelve million, five hundred thirty-one thousand, five hundred forty-three".