1286143 has 4 divisors (see below), whose sum is σ = 1288600. Its totient is φ = 1283688.

The previous prime is 1286119. The next prime is 1286147. The reversal of 1286143 is 3416821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3416821 = 673 ⋅5077.

It is a cyclic number.

It is not a de Polignac number, because 1286143 - 2¹⁷ = 1155071 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a nialpdrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1286147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93 + ... + 1606.

It is an arithmetic number, because the mean of its divisors is an integer number (322150).

2^1286143 is an apocalyptic number.

1286143 is a deficient number, since it is larger than the sum of its proper divisors (2457).

1286143 is an equidigital number, since it uses as much as digits as its factorization.

1286143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2456.

The product of its digits is 1152, while the sum is 25.

The square root of 1286143 is about 1134.0824485019. The cubic root of 1286143 is about 108.7501219887.

The spelling of 1286143 in words is "one million, two hundred eighty-six thousand, one hundred forty-three".