18125143 has 4 divisors (see below), whose sum is σ = 18136168. Its totient is φ = 18114120.

The previous prime is 18125131. The next prime is 18125161. The reversal of 18125143 is 34152181.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18125143 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 (18125543) 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 3 ways as a sum of consecutive naturals, for example, 2496 + ... + 6517.

It is an arithmetic number, because the mean of its divisors is an integer number (4534042).

Almost surely, 2^18125143 is an apocalyptic number.

18125143 is a deficient number, since it is larger than the sum of its proper divisors (11025).

18125143 is an equidigital number, since it uses as much as digits as its factorization.

18125143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11024.

The product of its digits is 960, while the sum is 25.

The square root of 18125143 is about 4257.3633859468. The cubic root of 18125143 is about 262.6800844394.

The spelling of 18125143 in words is "eighteen million, one hundred twenty-five thousand, one hundred forty-three".