409143 has 8 divisors (see below), whose sum is σ = 623488. Its totient is φ = 233784.

The previous prime is 409121. The next prime is 409153. The reversal of 409143 is 341904.

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

It is not a de Polignac number, because 409143 - 2⁹ = 408631 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 19483 = 409143 / (4 + 0 + 9 + 1 + 4 + 3).

It is a Duffinian number.

409143 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409153) 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, 9721 + ... + 9762.

It is an arithmetic number, because the mean of its divisors is an integer number (77936).

2⁴⁰⁹¹⁴³ is an apocalyptic number.

409143 is a deficient number, since it is larger than the sum of its proper divisors (214345).

409143 is a wasteful number, since it uses less digits than its factorization.

409143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19493.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 409143 is about 639.6428691074. The cubic root of 409143 is about 74.2377911883.

The spelling of 409143 in words is "four hundred nine thousand, one hundred forty-three".