409859 has 4 divisors (see below), whose sum is σ = 416640. Its totient is φ = 403080.

The previous prime is 409841. The next prime is 409861. The reversal of 409859 is 958904.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 409859 - 2¹² = 405763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (409879) 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, 3299 + ... + 3420.

It is an arithmetic number, because the mean of its divisors is an integer number (104160).

2⁴⁰⁹⁸⁵⁹ is an apocalyptic number.

409859 is a deficient number, since it is larger than the sum of its proper divisors (6781).

409859 is an equidigital number, since it uses as much as digits as its factorization.

409859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6780.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 409859 is about 640.2023117734. The cubic root of 409859 is about 74.2810713145.

The spelling of 409859 in words is "four hundred nine thousand, eight hundred fifty-nine".