12981543 has 8 divisors (see below), whose sum is σ = 17731056. Its totient is φ = 8443200.

The previous prime is 12981539. The next prime is 12981581. The reversal of 12981543 is 34518921.

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

It is not a de Polignac number, because 12981543 - 2² = 12981539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12981643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52648 + ... + 52893.

It is an arithmetic number, because the mean of its divisors is an integer number (2216382).

Almost surely, 2^12981543 is an apocalyptic number.

12981543 is a deficient number, since it is larger than the sum of its proper divisors (4749513).

12981543 is a wasteful number, since it uses less digits than its factorization.

12981543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105585.

The product of its digits is 8640, while the sum is 33.

The square root of 12981543 is about 3602.9908409542. The cubic root of 12981543 is about 235.0221376459.

The spelling of 12981543 in words is "twelve million, nine hundred eighty-one thousand, five hundred forty-three".