143289 has 20 divisors (see below), whose sum is σ = 225060. Its totient is φ = 90720.

The previous prime is 143287. The next prime is 143291. The reversal of 143289 is 982341.

It is an interprime number because it is at equal distance from previous prime (143287) and next prime (143291).

It can be written as a sum of positive squares in 2 ways, for example, as 32400 + 110889 = 180^2 + 333^2 .

It is not a de Polignac number, because 143289 - 2¹ = 143287 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 143289.

It is not an unprimeable number, because it can be changed into a prime (143281) 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 19 ways as a sum of consecutive naturals, for example, 2319 + ... + 2379.

It is an arithmetic number, because the mean of its divisors is an integer number (11253).

2¹⁴³²⁸⁹ is an apocalyptic number.

It is an amenable number.

143289 is a deficient number, since it is larger than the sum of its proper divisors (81771).

143289 is an equidigital number, since it uses as much as digits as its factorization.

143289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102 (or 93 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 143289 is about 378.5353352066. The cubic root of 143289 is about 52.3284194430.

It can be divided in two parts, 1432 and 89, that added together give a square (1521 = 39²).

The spelling of 143289 in words is "one hundred forty-three thousand, two hundred eighty-nine".