1268143 has 2 divisors, whose sum is σ = 1268144. Its totient is φ = 1268142.

The previous prime is 1268119. The next prime is 1268147. The reversal of 1268143 is 3418621.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1268143 is a prime.

It is an Ulam number.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1268147) 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 as a sum of consecutive naturals, namely, 634071 + 634072.

It is an arithmetic number, because the mean of its divisors is an integer number (634072).

2^1268143 is an apocalyptic number.

1268143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1268143 is an equidigital number, since it uses as much as digits as its factorization.

1268143 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1268143 is about 1126.1185550376. The cubic root of 1268143 is about 108.2404052534.

The spelling of 1268143 in words is "one million, two hundred sixty-eight thousand, one hundred forty-three".