906405 has 8 divisors (see below), whose sum is σ = 1450272. Its totient is φ = 483408.

The previous prime is 906403. The next prime is 906421. The reversal of 906405 is 504609.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 906405 - 2¹ = 906403 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 906405.

It is not an unprimeable number, because it can be changed into a prime (906403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30199 + ... + 30228.

It is an arithmetic number, because the mean of its divisors is an integer number (181284).

2⁹⁰⁶⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

906405 is a deficient number, since it is larger than the sum of its proper divisors (543867).

906405 is a wasteful number, since it uses less digits than its factorization.

906405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60435.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 906405 is about 952.0530447407. The cubic root of 906405 is about 96.7774328127. Note that the first 3 decimals are identical.

The spelling of 906405 in words is "nine hundred six thousand, four hundred five".