1284143 has 12 divisors (see below), whose sum is σ = 1518480. Its totient is φ = 1082592.

The previous prime is 1284131. The next prime is 1284169. The reversal of 1284143 is 3414821.

It is not a de Polignac number, because 1284143 - 2¹⁰ = 1283119 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 (1284043) 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 11 ways as a sum of consecutive naturals, for example, 3398 + ... + 3756.

It is an arithmetic number, because the mean of its divisors is an integer number (126540).

2^1284143 is an apocalyptic number.

1284143 is a deficient number, since it is larger than the sum of its proper divisors (234337).

1284143 is an equidigital number, since it uses as much as digits as its factorization.

1284143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446 (or 439 counting only the distinct ones).

The product of its digits is 768, while the sum is 23.

The square root of 1284143 is about 1133.2003353335. The cubic root of 1284143 is about 108.6937225884.

Adding to 1284143 its reverse (3414821), we get a palindrome (4698964).

The spelling of 1284143 in words is "one million, two hundred eighty-four thousand, one hundred forty-three".