1284431143 has 2 divisors, whose sum is σ = 1284431144. Its totient is φ = 1284431142.

The previous prime is 1284431101. The next prime is 1284431173. The reversal of 1284431143 is 3411344821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1284431143 is a prime.

It is a super-2 number, since 2×1284431143² = 3299526722216572898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1284431173) 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 as a sum of consecutive naturals, namely, 642215571 + 642215572.

It is an arithmetic number, because the mean of its divisors is an integer number (642215572).

Almost surely, 2^1284431143 is an apocalyptic number.

1284431143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1284431143 is an equidigital number, since it uses as much as digits as its factorization.

1284431143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 31.

The square root of 1284431143 is about 35838.9612433173. The cubic root of 1284431143 is about 1087.0185174351.

Adding to 1284431143 its reverse (3411344821), we get a palindrome (4695775964).

The spelling of 1284431143 in words is "one billion, two hundred eighty-four million, four hundred thirty-one thousand, one hundred forty-three".