12543387 has 4 divisors (see below), whose sum is σ = 16724520. Its totient is φ = 8362256.

The previous prime is 12543379. The next prime is 12543397. The reversal of 12543387 is 78334521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12543387 - 2³ = 12543379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12543337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2090562 + ... + 2090567.

It is an arithmetic number, because the mean of its divisors is an integer number (4181130).

Almost surely, 2^12543387 is an apocalyptic number.

12543387 is a deficient number, since it is larger than the sum of its proper divisors (4181133).

12543387 is an equidigital number, since it uses as much as digits as its factorization.

12543387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4181132.

The product of its digits is 20160, while the sum is 33.

The square root of 12543387 is about 3541.6644392150. The cubic root of 12543387 is about 232.3476444322.

The spelling of 12543387 in words is "twelve million, five hundred forty-three thousand, three hundred eighty-seven".