999495 has 48 divisors (see below), whose sum is σ = 2096640. Its totient is φ = 430272.

The previous prime is 999491. The next prime is 999499. The reversal of 999495 is 594999.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (999491) and next prime (999499).

It is not a de Polignac number, because 999495 - 2² = 999491 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 999495.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999491) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5902 + ... + 6068.

It is an arithmetic number, because the mean of its divisors is an integer number (43680).

2⁹⁹⁹⁴⁹⁵ is an apocalyptic number.

999495 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

999495 is an abundant number, since it is smaller than the sum of its proper divisors (1097145).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999495 is a wasteful number, since it uses less digits than its factorization.

999495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 201 counting only the distinct ones).

The product of its digits is 131220, while the sum is 45.

The square root of 999495 is about 999.7474681138. The cubic root of 999495 is about 99.9831638323.

Subtracting from 999495 its reverse (594999), we obtain a square (404496 = 636²).

The spelling of 999495 in words is "nine hundred ninety-nine thousand, four hundred ninety-five".