143985 has 16 divisors (see below), whose sum is σ = 239040. Its totient is φ = 73920.

The previous prime is 143981. The next prime is 143999. The reversal of 143985 is 589341.

It is not a de Polignac number, because 143985 - 2² = 143981 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 143985.

It is not an unprimeable number, because it can be changed into a prime (143981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 270 + ... + 600.

It is an arithmetic number, because the mean of its divisors is an integer number (14940).

2¹⁴³⁹⁸⁵ is an apocalyptic number.

143985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

143985 is a deficient number, since it is larger than the sum of its proper divisors (95055).

143985 is a wasteful number, since it uses less digits than its factorization.

143985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368.

The product of its digits is 4320, while the sum is 30.

The square root of 143985 is about 379.4535544701. The cubic root of 143985 is about 52.4130078617.

It can be divided in two parts, 143 and 985, that added together give a triangular number (1128 = T₄₇).

The spelling of 143985 in words is "one hundred forty-three thousand, nine hundred eighty-five".