996405 has 16 divisors (see below), whose sum is σ = 1607424. Its totient is φ = 527040.

The previous prime is 996403. The next prime is 996407. The reversal of 996405 is 504699.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (996403) and next prime (996407).

It is not a de Polignac number, because 996405 - 2¹ = 996403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (996403) 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 15 ways as a sum of consecutive naturals, for example, 2532 + ... + 2898.

It is an arithmetic number, because the mean of its divisors is an integer number (100464).

2⁹⁹⁶⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

996405 is a deficient number, since it is larger than the sum of its proper divisors (611019).

996405 is a wasteful number, since it uses less digits than its factorization.

996405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 996405 is about 998.2008815865. The cubic root of 996405 is about 99.8800227789.

The spelling of 996405 in words is "nine hundred ninety-six thousand, four hundred five".