143091 has 12 divisors (see below), whose sum is σ = 222768. Its totient is φ = 87984.

The previous prime is 143063. The next prime is 143093. The reversal of 143091 is 190341.

It is not a de Polignac number, because 143091 - 2⁷ = 142963 is a prime.

It is a Smith number, since the sum of its digits (18) coincides with the sum of the digits of its prime factors.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 143091.

It is not an unprimeable number, because it can be changed into a prime (143093) 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, 495 + ... + 728.

It is an arithmetic number, because the mean of its divisors is an integer number (18564).

2¹⁴³⁰⁹¹ is an apocalyptic number.

143091 is a deficient number, since it is larger than the sum of its proper divisors (79677).

143091 is a wasteful number, since it uses less digits than its factorization.

143091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242 (or 1239 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 143091 is about 378.2737104267. The cubic root of 143091 is about 52.3043054657.

It can be divided in two parts, 1430 and 91, that added together give a square (1521 = 39²).

The spelling of 143091 in words is "one hundred forty-three thousand, ninety-one".