1142789 has 2 divisors, whose sum is σ = 1142790. Its totient is φ = 1142788.

The previous prime is 1142783. The next prime is 1142809. The reversal of 1142789 is 9872411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 693889 + 448900 = 833^2 + 670^2 .

It is a cyclic number.

It is not a de Polignac number, because 1142789 - 2⁴ = 1142773 is a prime.

It is a super-3 number, since 3×1142789³ = 4477333132308345207, which contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1142783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571394 + 571395.

It is an arithmetic number, because the mean of its divisors is an integer number (571395).

2^1142789 is an apocalyptic number.

It is an amenable number.

1142789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1142789 is an equidigital number, since it uses as much as digits as its factorization.

1142789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 32.

The square root of 1142789 is about 1069.0130962715. The cubic root of 1142789 is about 104.5495137108.

The spelling of 1142789 in words is "one million, one hundred forty-two thousand, seven hundred eighty-nine".