1208143 has 4 divisors (see below), whose sum is σ = 1228680. Its totient is φ = 1187608.

The previous prime is 1208131. The next prime is 1208149. The reversal of 1208143 is 3418021.

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-1208143 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1208143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1208149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10180 + ... + 10297.

It is an arithmetic number, because the mean of its divisors is an integer number (307170).

2^1208143 is an apocalyptic number.

1208143 is a deficient number, since it is larger than the sum of its proper divisors (20537).

1208143 is an equidigital number, since it uses as much as digits as its factorization.

1208143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20536.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1208143 is about 1099.1555849833. The cubic root of 1208143 is about 106.5056827256.

The spelling of 1208143 in words is "one million, two hundred eight thousand, one hundred forty-three".