853405 has 16 divisors (see below), whose sum is σ = 1203840. Its totient is φ = 568512.

The previous prime is 853403. The next prime is 853427. The reversal of 853405 is 504358.

It is a happy number.

853405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 853405 - 2¹ = 853403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 853405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (853403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 966 + ... + 1624.

It is an arithmetic number, because the mean of its divisors is an integer number (75240).

2⁸⁵³⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

853405 is a deficient number, since it is larger than the sum of its proper divisors (350435).

853405 is a wasteful number, since it uses less digits than its factorization.

853405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 853405 is about 923.7992206102. The cubic root of 853405 is about 94.8531433651.

The spelling of 853405 in words is "eight hundred fifty-three thousand, four hundred five".