12287143 has 4 divisors (see below), whose sum is σ = 13404168. Its totient is φ = 11170120.

The previous prime is 12287137. The next prime is 12287147. The reversal of 12287143 is 34178221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12287143 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 (12287147) 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, 558496 + ... + 558517.

It is an arithmetic number, because the mean of its divisors is an integer number (3351042).

Almost surely, 2^12287143 is an apocalyptic number.

12287143 is a deficient number, since it is larger than the sum of its proper divisors (1117025).

12287143 is a wasteful number, since it uses less digits than its factorization.

12287143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117024.

The product of its digits is 2688, while the sum is 28.

The square root of 12287143 is about 3505.3021267788. The cubic root of 12287143 is about 230.7545665069.

The spelling of 12287143 in words is "twelve million, two hundred eighty-seven thousand, one hundred forty-three".