999105 has 16 divisors (see below), whose sum is σ = 1636800. Its totient is φ = 520128.

The previous prime is 999101. The next prime is 999133. The reversal of 999105 is 501999.

It is not a de Polignac number, because 999105 - 2² = 999101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999101) 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, 130 + ... + 1419.

It is an arithmetic number, because the mean of its divisors is an integer number (102300).

2⁹⁹⁹¹⁰⁵ is an apocalyptic number.

It is an amenable number.

999105 is a deficient number, since it is larger than the sum of its proper divisors (637695).

999105 is a wasteful number, since it uses less digits than its factorization.

999105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600.

The product of its (nonzero) digits is 3645, while the sum is 33.

The square root of 999105 is about 999.5523998270. The cubic root of 999105 is about 99.9701577620.

The spelling of 999105 in words is "nine hundred ninety-nine thousand, one hundred five".