841405 has 4 divisors (see below), whose sum is σ = 1009692. Its totient is φ = 673120.

The previous prime is 841397. The next prime is 841411. The reversal of 841405 is 504148.

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 502681 + 338724 = 709^2 + 582^2 .

It is not a de Polignac number, because 841405 - 2³ = 841397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84136 + ... + 84145.

It is an arithmetic number, because the mean of its divisors is an integer number (252423).

2⁸⁴¹⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

841405 is a deficient number, since it is larger than the sum of its proper divisors (168287).

841405 is a wasteful number, since it uses less digits than its factorization.

841405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168286.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 841405 is about 917.2813090868. The cubic root of 841405 is about 94.4064563357.

The spelling of 841405 in words is "eight hundred forty-one thousand, four hundred five".