143491 has 8 divisors (see below), whose sum is σ = 152064. Its totient is φ = 135240.

The previous prime is 143489. The next prime is 143501. The reversal of 143491 is 194341.

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

It is a cyclic number.

It is not a de Polignac number, because 143491 - 2¹ = 143489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143401) 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, 1986 + ... + 2056.

It is an arithmetic number, because the mean of its divisors is an integer number (19008).

2¹⁴³⁴⁹¹ is an apocalyptic number.

143491 is a deficient number, since it is larger than the sum of its proper divisors (8573).

143491 is an equidigital number, since it uses as much as digits as its factorization.

143491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161.

The product of its digits is 432, while the sum is 22.

The square root of 143491 is about 378.8020591285. The cubic root of 143491 is about 52.3529976904.

The spelling of 143491 in words is "one hundred forty-three thousand, four hundred ninety-one".