854405 has 4 divisors (see below), whose sum is σ = 1025292. Its totient is φ = 683520.

The previous prime is 854387. The next prime is 854407. The reversal of 854405 is 504458.

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 574564 + 279841 = 758^2 + 529^2 .

It is not a de Polignac number, because 854405 - 2⁸ = 854149 is a prime.

It is a super-4 number, since 4×854405⁴ (a number of 25 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent 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, 85436 + ... + 85445.

It is an arithmetic number, because the mean of its divisors is an integer number (256323).

2⁸⁵⁴⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

854405 is a deficient number, since it is larger than the sum of its proper divisors (170887).

854405 is a wasteful number, since it uses less digits than its factorization.

854405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170886.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 854405 is about 924.3403052989. The cubic root of 854405 is about 94.8901778011.

The spelling of 854405 in words is "eight hundred fifty-four thousand, four hundred five".