143161 has 4 divisors (see below), whose sum is σ = 144000. Its totient is φ = 142324.

The previous prime is 143159. The next prime is 143177. The reversal of 143161 is 161341.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 143161 - 2¹ = 143159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61 + ... + 538.

It is an arithmetic number, because the mean of its divisors is an integer number (36000).

2¹⁴³¹⁶¹ is an apocalyptic number.

It is an amenable number.

143161 is a deficient number, since it is larger than the sum of its proper divisors (839).

143161 is an equidigital number, since it uses as much as digits as its factorization.

143161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838.

The product of its digits is 72, while the sum is 16.

The square root of 143161 is about 378.3662247083. The cubic root of 143161 is about 52.3128331497.

The spelling of 143161 in words is "one hundred forty-three thousand, one hundred sixty-one".