12543906 has 8 divisors (see below), whose sum is σ = 25087824. Its totient is φ = 4181300.

The previous prime is 12543893. The next prime is 12543911. The reversal of 12543906 is 60934521.

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

12543906 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1045320 + ... + 1045331.

It is an arithmetic number, because the mean of its divisors is an integer number (3135978).

Almost surely, 2^12543906 is an apocalyptic number.

12543906 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12543906 is a wasteful number, since it uses less digits than its factorization.

12543906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2090656.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 12543906 is about 3541.7377090914. The cubic root of 12543906 is about 232.3508489565.

The spelling of 12543906 in words is "twelve million, five hundred forty-three thousand, nine hundred six".