143105985 has 24 divisors (see below), whose sum is σ = 270601344. Its totient is φ = 69384480.

The previous prime is 143105969. The next prime is 143105999. The reversal of 143105985 is 589501341.

143105985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 143105985 - 2⁴ = 143105969 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 144057 + ... + 145046.

It is an arithmetic number, because the mean of its divisors is an integer number (11275056).

Almost surely, 2^143105985 is an apocalyptic number.

143105985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

143105985 is a deficient number, since it is larger than the sum of its proper divisors (127495359).

143105985 is a wasteful number, since it uses less digits than its factorization.

143105985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289125 (or 289122 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 143105985 is about 11962.6913777795. The cubic root of 143105985 is about 523.0613123308.

The spelling of 143105985 in words is "one hundred forty-three million, one hundred five thousand, nine hundred eighty-five".