854409 has 4 divisors (see below), whose sum is σ = 1139216. Its totient is φ = 569604.

The previous prime is 854407. The next prime is 854417. The reversal of 854409 is 904458.

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.

It is not a de Polignac number, because 854409 - 2¹ = 854407 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (854407) 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, 142399 + ... + 142404.

It is an arithmetic number, because the mean of its divisors is an integer number (284804).

2⁸⁵⁴⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

854409 is a deficient number, since it is larger than the sum of its proper divisors (284807).

854409 is a wasteful number, since it uses less digits than its factorization.

854409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284806.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 854409 is about 924.3424690016. The cubic root of 854409 is about 94.8903258808.

The spelling of 854409 in words is "eight hundred fifty-four thousand, four hundred nine".