143591 has 8 divisors (see below), whose sum is σ = 166944. Its totient is φ = 120960.

The previous prime is 143573. The next prime is 143593. The reversal of 143591 is 195341.

It is a happy number.

143591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 143591 - 2⁶ = 143527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143593) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371 + ... + 651.

It is an arithmetic number, because the mean of its divisors is an integer number (20868).

2¹⁴³⁵⁹¹ is an apocalyptic number.

143591 is a deficient number, since it is larger than the sum of its proper divisors (23353).

143591 is an equidigital number, since it uses as much as digits as its factorization.

143591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361.

The product of its digits is 540, while the sum is 23.

The square root of 143591 is about 378.9340311980. The cubic root of 143591 is about 52.3651566041.

The spelling of 143591 in words is "one hundred forty-three thousand, five hundred ninety-one".