854209 has 4 divisors (see below), whose sum is σ = 856660. Its totient is φ = 851760.

The previous prime is 854171. The next prime is 854213. The reversal of 854209 is 902458.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 418609 + 435600 = 647^2 + 660^2 .

It is a cyclic number.

It is not a de Polignac number, because 854209 - 2¹⁵ = 821441 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (854299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 594 + ... + 1435.

It is an arithmetic number, because the mean of its divisors is an integer number (214165).

2⁸⁵⁴²⁰⁹ is an apocalyptic number.

It is an amenable number.

854209 is a deficient number, since it is larger than the sum of its proper divisors (2451).

854209 is a wasteful number, since it uses less digits than its factorization.

854209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2450.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 854209 is about 924.2342776591. The cubic root of 854209 is about 94.8829213293.

The spelling of 854209 in words is "eight hundred fifty-four thousand, two hundred nine".